The work done required to put the four charges together at the comers of a square of side a, as shown in the figure is-
A)
\[\frac{1}{4\pi {{\varepsilon }_{0}}}\,\,\frac{{{q}^{2}}}{a}\]
done
clear
B)
\[-\frac{2.6{{q}^{2}}}{4\pi {{\varepsilon }_{0}}}\,\,\frac{{{q}^{2}}}{a}\]
done
clear
C)
\[+\frac{2.6}{4\pi {{\varepsilon }_{0}}}\,\,\frac{{{q}^{2}}}{a}\]
done
clear
D)
none of these
done
clear
View Answer play_arrow
The bob of a pendulum carries an electric charge of \[39.2\,\,\times \,\,{{10}^{-}}^{10}\] coulomb in a horizontal electric field of \[20\text{ }\times \text{ }{{10}^{3}}\,V/m\] and it is at rest. The angle made by the pendulum with the vertical will be, if the mass of pendulum is \[8\,\,\times \,\,{{10}^{-6}}\text{ }kg\] and \[g\,\,=\,\,9.8\text{ }m/{{s}^{2}}\]-
A)
\[30{}^\circ \]
done
clear
B)
\[45{}^\circ \]
done
clear
C)
\[60{}^\circ \]
done
clear
D)
\[120{}^\circ \]
done
clear
View Answer play_arrow
Two identical capacitors, have the same capacitance C. One of them is charged to potential \[{{V}_{1}}\] and the other to\[{{V}_{2}}\]. The negative ends of the capacitors are connected together. When the positive ends are also connected, the decrease in energy of the combined system is-
A)
\[\frac{1}{4}\,\,C\,(V_{1}^{2}-V_{2}^{2})\]
done
clear
B)
\[\frac{1}{4}\,\,C\,(V_{1}^{2}+V_{2}^{2})\]
done
clear
C)
\[\frac{1}{4}\,\,C\,\,{{({{V}_{1}}-{{V}_{2}})}^{2}}\]
done
clear
D)
\[\frac{1}{4}\,\,C\,\,{{({{V}_{1}}+{{V}_{2}})}^{2}}\]
done
clear
View Answer play_arrow
In the given figure, the emf of the cell is 2V and internal resistance is negligible. The resistance of the voltmeter is 80 ohm. The reading of voltmeter will be-
A)
2.00 volt
done
clear
B)
1.33 volt
done
clear
C)
1.60 volt
done
clear
D)
0.80 volt
done
clear
View Answer play_arrow
Twelve wires each of resistance \[6\,\Omega \] are connected to form a cube as shown in the adjoining figure. The current enters at a corner A and leaves at the diagonally opposite comer G. The equivalent resistance across the comers A and G is-
A)
\[12\,\Omega \]
done
clear
B)
\[6\,\Omega \]
done
clear
C)
\[3\,\Omega \]
done
clear
D)
\[5\,\Omega \]
done
clear
View Answer play_arrow
In the circuit shown in the figure, reading of voltmeter is \[{{V}_{1}}\] when only \[{{S}_{1}}\] is closed, reading of voltmeter is \[{{V}_{2}}\] when only \[{{S}_{2}}\] is closed and reading of voltmeter is \[{{V}_{3}}\] when both \[{{S}_{1}}\] and \[{{S}_{2}}\] are closed. Then-
A)
\[{{V}_{3}}>{{V}_{2}}>{{V}_{1}}\]
done
clear
B)
\[{{V}_{2}}>{{V}_{1}}>{{V}_{1}}\]
done
clear
C)
\[{{V}_{3}}>{{V}_{1}}>{{V}_{2}}\]
done
clear
D)
\[{{V}_{1}}>{{V}_{2}}>{{V}_{3}}\]
done
clear
View Answer play_arrow
The magnetic field existing in a region is given by\[\overrightarrow{B}={{B}_{0}}\left[ 1+\frac{x}{\ell } \right]\widehat{k}\]. A square loop of edge\[\ell \]. and carrying current I is placed with its edges parallel to the x-y axis. The magnitude of the net magnetic force experienced by the loop is-
A)
\[2{{B}_{0}}I\ell \]
done
clear
B)
\[{{B}_{0}}{{I}_{0}}\ell \]
done
clear
C)
\[{{B}_{0}}I\ell \]
done
clear
D)
\[BI\ell \]
done
clear
View Answer play_arrow
A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil will be-
A)
\[nB\]
done
clear
B)
\[{{n}^{2}}B\]
done
clear
C)
\[2nB\]
done
clear
D)
\[BI\ell \]
done
clear
View Answer play_arrow
A magnet is suspended in such a way that it oscillates in the horizontal plane. It makes 20 oscillations per minute at a place where dip angle is \[30{}^\circ \] and 15 oscillations per minute at a place where dip angle is \[60{}^\circ \]. The ratio of the total earth?s magnetic field at the two places is-
A)
\[3\sqrt{3}\,\,:\,\,8\]
done
clear
B)
\[16\,\,:\,\,9\sqrt{3}\]
done
clear
C)
\[4\,\,:\,\,9\]
done
clear
D)
\[2\sqrt{3}\,\,:\,\,9\]
done
clear
View Answer play_arrow
A circular coil of radius a and having N turns is placed at centre of a long solenoid, coaxially. The solenoid has radius \[b\,(b>>a)\] and number of turns per unit length is n. Their coefficient of mutual inductance will be-
A)
\[{{\mu }_{0}}n{{N}^{2}}\pi {{a}^{2}}\]
done
clear
B)
\[{{\mu }_{0}}nN\pi {{a}^{2}}\]
done
clear
C)
\[{{\mu }_{0}}{{n}^{2}}N\pi {{a}^{2}}\]
done
clear
D)
\[{{\mu }_{0}}{{n}^{2}}{{N}^{2}}\pi {{a}^{2}}\]
done
clear
View Answer play_arrow
Select the correct alternative (s): L, C and R denote inductance, capacitance and resistance respectively. The combinations which have the dimensions of frequency are-
[a] \[1/RC\] [b] \[R/L\] [c] \[R/L\] [d] \[C/L\]
A)
a, b, c
done
clear
B)
a, b, d
done
clear
C)
a, c, d
done
clear
D)
b, c, d
done
clear
View Answer play_arrow
The relation between electric field E and magnetic field induction B in an electromagnetic wave-
A)
\[E=\sqrt{\frac{{{\mu }_{0}}}{{{\varepsilon }_{0}}}}\,B\]
done
clear
B)
\[E\,\,=\,\,cB\]
done
clear
C)
\[E\,\,=\,\,\frac{B}{c}\]
done
clear
D)
\[E\,\,=\,\,\frac{B}{{{c}^{2}}}\]
done
clear
View Answer play_arrow
The horizontal range and maximum height attained by a projectile are R and H respectively. If a constant horizontal acceleration \[a=g/4\] is imparted to the projectile due to wind, then its horizontal range and maximum height will be-
A)
\[(R+H),\,\frac{H}{2}\]
done
clear
B)
\[\left( R+\frac{H}{2} \right),\,\,2H\]
done
clear
C)
\[\left( R+2H \right),\,\,H\]
done
clear
D)
\[\left( R+H \right),\,\,H\]
done
clear
View Answer play_arrow
The velocity of a particle is\[v={{v}^{0}}+gt+f{{t}^{2}}\]. If its position is \[x=0\text{ }at\text{ }t=0\], then its displacement after unit time \[\left( t=1 \right)\] is-
A)
\[{{v}_{0}}+2g+3f\]
done
clear
B)
\[{{v}_{0}}+g/2+f/3\]
done
clear
C)
\[{{v}_{0}}+g+f\]
done
clear
D)
\[{{v}_{0}}+g/2+f\]
done
clear
View Answer play_arrow
An object originally at the point (2, 5, 1) cm is given a displacement\[8\widehat{i}-2\widehat{j}+\widehat{k}\,\,cm\]. The co- ordinates of the new position are-
A)
(10, 3, 2) cm
done
clear
B)
(8,-2, 1) cm
done
clear
C)
(0, 0, 0) cm
done
clear
D)
data not correct
done
clear
View Answer play_arrow
For the arrangement shown in figure the coefficient of friction between the two blocks is\[\mu \]. If both the block are identical, then the acceleration of each block is-
A)
\[\frac{F}{2m}-2\mu g\]
done
clear
B)
\[\frac{F}{2m}\]
done
clear
C)
\[\frac{F}{2m}-\mu g\]
done
clear
D)
zero
done
clear
View Answer play_arrow
A block of mass m rests on a rough horizontal surface as shown in the figure. Coefficient of friction between the block and the surface is p. A force \[F=mg\] acting at angle \[\theta \] with the vertical side of the block pulls it. In which of the following cases can the block be pulled along the surface?
A)
\[\tan \,\theta \,\,\ge \,\,\mu \,\]
done
clear
B)
\[\cot \,\theta \,\,\ge \,\,\mu \,\]
done
clear
C)
\[\tan \,\,\frac{\theta }{2}\,\,\ge \,\,\mu \,\]
done
clear
D)
\[cot\,\,\frac{\theta }{2}\,\,\ge \,\,\mu \,\]
done
clear
View Answer play_arrow
A bullet when fired at a target has its velocity decreased to \[50\,%\] after penetrating 30 cm into it. Then the additional thickness it will penetrate before coming to rest is
A)
10 cm
done
clear
B)
30 cm
done
clear
C)
40 cm
done
clear
D)
60 cm
done
clear
View Answer play_arrow
A bomb of mass 9 kg explodes into the fragments of masses 3 kg and 6 kg. The velocity of mass 3 kg is\[16\text{ }m{{s}^{-}}^{1}\]. The energy of explosion is equal to-
A)
384 J
done
clear
B)
576 J
done
clear
C)
192 J
done
clear
D)
1152 J
done
clear
View Answer play_arrow
50 gm of ice is heated to increase its temperature by\[10{}^\circ C\]. If the same quantity of heat is given to 10 gm of water, the rise in its temperature is-
A)
\[25{}^\circ C\]
done
clear
B)
\[20{}^\circ C\]
done
clear
C)
\[17{}^\circ C~\]
done
clear
D)
\[18{}^\circ C\]
done
clear
View Answer play_arrow
Half a mole of helium at \[27{}^\circ C\] and at a pressure of 2 atmosphere is mixed with 1.5 mole of \[{{N}_{2}}\] at \[77{}^\circ C\] and at a pressure at 5 atmosphere so that the volume of the mixture is equal to the sum of their initial volumes. If the temperature of the mixture is \[69{}^\circ C\], its pressure in atmosphere is-
A)
3.5
done
clear
B)
3.8
done
clear
C)
3.95
done
clear
D)
4.25
done
clear
View Answer play_arrow
At \[27{}^\circ C\] two moles of an ideal monatomic gas occupy a volume V. The gas expands adiabatically to a volume 2V. Final temperature of the gas-
A)
200 K
done
clear
B)
250 K
done
clear
C)
173 K
done
clear
D)
189 K
done
clear
View Answer play_arrow
The temperatures of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x respectively are\[{{T}_{2}}\,\,and\,\,{{T}_{1}}({{T}_{2}}>{{T}_{1}})\]. The rate of heat transfer through the slab, in a steady state is \[\left( \frac{A({{T}_{2}}-{{T}_{1}})K}{x} \right)f,\,\,\,\]with \[f\] equal to-
A)
\[1\]
done
clear
B)
\[1/2\]
done
clear
C)
\[2/3\]
done
clear
D)
\[1/3\]
done
clear
View Answer play_arrow
Two rods of lengths \[{{\ell }_{1}}\,\,and\,\,{{\ell }_{2}}\] are made of materials whose coefficient of linear expansions are\[{{\alpha }_{1}}\,\,and\,\,{{\alpha }_{2}}\]. If the difference between two lengths is independent of temperature-
A)
\[\frac{{{\ell }_{1}}}{{{\ell }_{2}}}\,\,=\,\,\frac{{{\alpha }_{1}}}{{{\alpha }_{2}}}\]
done
clear
B)
\[\frac{{{\ell }_{1}}}{{{\ell }_{2}}}\,\,=\,\,\frac{{{\alpha }_{2}}}{{{\alpha }_{1}}}\]
done
clear
C)
\[\ell _{2}^{2}{{\alpha }_{1}}\,\,=\,\,\ell _{1}^{2}{{\alpha }_{2}}\]
done
clear
D)
\[\frac{\alpha _{1}^{2}}{{{\ell }_{1}}}=\frac{\alpha _{2}^{2}}{{{\ell }_{2}}}\]
done
clear
View Answer play_arrow
A wave travels in a medium according to the equation of displacement given by \[y\,\,=\,\,0.03\text{ }sin\,\pi \left( 2t-0.0\text{1}x \right)\] where y and x are in metres and t in seconds. The wavelength of the wave is-
A)
200 m
done
clear
B)
100 m
done
clear
C)
20 m
done
clear
D)
10 m
done
clear
View Answer play_arrow
The velocity of the sound in a stationary medium is 'a'. A sound source is moving with a velocity 'b' toward a stationary observer. If the frequency of sound sources is n, then the fractional change in the frequency as heard by the observer is-
A)
\[\frac{a}{a-b}\]
done
clear
B)
\[\frac{b}{a-b}\]
done
clear
C)
\[\frac{a}{b}\,n\]
done
clear
D)
\[\frac{a+b}{a}\,\]
done
clear
View Answer play_arrow
In semiconductor the concentrations of electrons and holes are \[8\,\,\times \,\,{{10}^{18}}/{{m}^{3}}\] and \[5\,\,\times \,\,{{10}^{18}}/{{m}^{3}}\] respectively. If the mobilities of electrons and holes are \[2.3\,{{m}^{2}}/{{V}^{-2}}\] and 0.01 \[{{m}^{2}}/V-s\] respectively, then semiconductor is:
A)
n-type and its resistivity is \[0.34\,\Omega -m\]
done
clear
B)
p-type and its resistivity is \[0.034\,\Omega -m\]
done
clear
C)
n-type and its resistivity is \[0.034\,\Omega -m\]
done
clear
D)
p-type and its resistivity is \[3.4\,\,\Omega -m\]
done
clear
View Answer play_arrow
The volume of brick is 2.197 litres. The submerged brick is balanced by a 2.54 kg mass on the beam scale. The weight of the brick is-
A)
46 N
done
clear
B)
50 N
done
clear
C)
56 N
done
clear
D)
72 N
done
clear
View Answer play_arrow
The stress versus strain graphs for wires of two materials A and B are as shown in the figure. If \[{{y}_{A}}\,\,and\,\,{{y}_{B}}_{}\] are the Young's modulus of the materials, then-
A)
\[{{y}_{B}}=2{{y}_{A}}\]
done
clear
B)
\[{{y}_{A}}={{y}_{B}}\]
done
clear
C)
\[{{y}_{B}}=3{{y}_{A}}\]
done
clear
D)
\[{{y}_{A}}=3{{y}_{B}}\]
done
clear
View Answer play_arrow
The time period of a particle in simple harmonic motion is T. After a time (T/6) sec it passes from some position, its-
[a] velocity will be one-half its maximum velocity [b] displacement will be one-half its amplitude [c] acceleration will be nearly \[86\,%\] of its maximum acceleration [d] \[KE\,\,=\,\,PE\]
A)
a, b
done
clear
B)
b, c
done
clear
C)
a, c
done
clear
D)
c, d
done
clear
View Answer play_arrow
The weight of a body decrease by \[51%\] of the weight on the earth?s surface at a height of-
A)
\[\frac{10}{7}R\]
done
clear
B)
\[\frac{7}{10}R\]
done
clear
C)
\[\frac{3}{7}\,R\]
done
clear
D)
\[\frac{2}{7}\,R\]
done
clear
View Answer play_arrow
The moment of inertia of sphere is \[20\text{ }kg-{{m}^{2}}\] about the diameter. The moment of inertia about any tangent will be-
A)
\[70\text{ }kg-{{m}^{2}}\]
done
clear
B)
\[35\text{ }kg-{{m}^{2}}\]
done
clear
C)
\[50\text{ }kg-{{m}^{2}}\]
done
clear
D)
\[20\text{ }kg-{{m}^{2}}\]
done
clear
View Answer play_arrow
A particle is moving along a circular path of radius 3 meter in such a way that the distance travelled measured along the circumference is given by \[S\,\,=\,\,\frac{{{t}^{2}}}{2}\,\,+\,\,\frac{{{t}^{3}}}{3}\]. The acceleration of particle when \[t\text{ }=\text{ }2\] sec is-
A)
\[1.3\,m/{{s}^{2}}\]
done
clear
B)
\[13\,m/{{s}^{2}}\]
done
clear
C)
\[3\,m/{{s}^{2}}\]
done
clear
D)
\[10\,m/{{s}^{2}}\]
done
clear
View Answer play_arrow
When light of intensity \[1\text{ }W/{{m}^{2}}\] and wavelength \[5\,\,\times \,\,{{10}^{-}}^{7}\,m\] is incident on a surface. It is completely absorbed by the surface. If 100 photons emit one electron and area of the surface is \[1\text{ }c{{m}^{2}}\], then the photoelectric current will be-
A)
\[2m\,A\]
done
clear
B)
\[0.4\,\mu A\]
done
clear
C)
\[4.0\text{ }mA\]
done
clear
D)
\[4\,\mu A\]
done
clear
View Answer play_arrow
The radius of second orbit of an electron in hydrogen atom is\[2.116\text{ }\overset{{}^\circ }{\mathop{A}}\,\]. The de Broglie wavelength associated with this electron in this orbit would be-
A)
\[6.64\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
B)
\[1.058\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
C)
\[2.116\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
D)
\[13.28\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
View Answer play_arrow
Two coherent sources of intensity ratio \[1\text{ }:\text{ }4\] produce an interference pattern. The fringe visibility will be-
A)
1
done
clear
B)
0.8
done
clear
C)
0.4
done
clear
D)
0.6
done
clear
View Answer play_arrow
The magnify power of the objective of a compound microscope is 7 if the magnifying power of the microscope is 35, then the magnifying power is eyepiece will be-
A)
245
done
clear
B)
5
done
clear
C)
28
done
clear
D)
42
done
clear
View Answer play_arrow
A beam of light strikes a piece of glass at an angle of incidence of \[60{}^\circ \] and the reflected beam is completely plane polarised. The refractive index of the glass is-
A)
\[1.5\]
done
clear
B)
\[\sqrt{3}\]
done
clear
C)
\[\sqrt{2}\]
done
clear
D)
\[(3/2)\]
done
clear
View Answer play_arrow
When a light ray enters a refracting medium, it is found that the magnitude of the angle of refraction is equal to half the angle of reflection. If n is the refractive index of the medium, then the angle of incidence is-
A)
\[2\text{ si}{{\text{n}}^{-}}^{1}\left( n/2 \right)~\]
done
clear
B)
\[2\text{ }co{{s}^{-}}^{1}\left( n/2 \right)\]
done
clear
C)
\[co{{s}^{-}}^{1}\left( n/2 \right)\]
done
clear
D)
\[si{{n}^{-}}^{1}\left( n/2 \right)\]
done
clear
View Answer play_arrow
A prism having an apex angle \[4{}^\circ \] and refractive index 1.5 is located in front of a vertical plane mirror as shown in figure. Through what total angle is the ray deviated after reflection from the mirror?
A)
\[176{}^\circ \]
done
clear
B)
\[4{}^\circ \]
done
clear
C)
\[178{}^\circ \]
done
clear
D)
\[2{}^\circ \]
done
clear
View Answer play_arrow
A light ray is incident on a plane mirror \[{{M}_{1}}\] at an angle of incidence\[45{}^\circ \]. At what angle from mirror \[{{M}_{1}}\] a second plane mirror \[{{M}_{2}}\] be placed in order that the finally reflected ray from mirror \[{{M}_{2}}\] goes parallel to the mirror\[{{M}_{1}}\]?
A)
\[22.5{}^\circ \]
done
clear
B)
\[30{}^\circ \]
done
clear
C)
\[45{}^\circ \]
done
clear
D)
\[67.5{}^\circ \]
done
clear
View Answer play_arrow
The rest mass of an electron as well as that of positron is 0.51 MeV. When an electron and positron are annihilate, they produce 2 gamma- photons of wavelength(s)-
A)
\[0.012\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
B)
\[0.024\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
C)
\[0.012\text{ }\overset{{}^\circ }{\mathop{A}}\,~\text{ }to\text{ }\infty \]
done
clear
D)
\[0.024\text{ }\overset{{}^\circ }{\mathop{A}}\,~\text{ }to\text{ }\infty \]
done
clear
View Answer play_arrow
hi X-ray tube when the accelerating voltage V is halved, the difference between the wavelength of \[K{{ }_{a}}\] line and minimum wavelength of continuous X-ray spectrum-
A)
remain constant
done
clear
B)
increases
done
clear
C)
becomes half
done
clear
D)
decreases
done
clear
View Answer play_arrow
A radioactive substance X decays into another radioactive substance Y. Initially only X was present. \[{{\lambda }_{x}}\text{ }and\text{ }{{\lambda }_{y}}\] are the disintegration constant of X and Y. \[{{N}_{x}}\text{ }and\text{ }{{N}_{y}}\] are the number of nuclei of X and Y at any time t. Number of nuclei \[{{N}_{y}}\] will be maximum when-
A)
\[\frac{{{N}_{y}}}{{{N}_{x}}-{{N}_{y}}}\,\,=\,\,\frac{{{\lambda }_{y}}}{{{\lambda }_{x}}-{{\lambda }_{y}}}\]
done
clear
B)
\[\frac{{{N}_{y}}}{{{N}_{x}}-{{N}_{y}}}\,\,=\,\,\frac{{{\lambda }_{y}}}{{{\lambda }_{x}}-{{\lambda }_{y}}}\]
done
clear
C)
\[{{\lambda }_{y}}{{N}_{y}}\,=\,\,{{\lambda }_{x}}{{N}_{x}}\]
done
clear
D)
\[{{\lambda }_{y}}{{N}_{x}}\,=\,\,{{\lambda }_{x}}{{N}_{y}}\]
done
clear
View Answer play_arrow
A beam of cathode rays accelerated across potential difference V is subjected to crossed Electric (E) and Magnetic fields [B]. The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by-
A)
\[\frac{{{E}^{2}}}{2V{{B}^{2}}}\]
done
clear
B)
\[\frac{{{B}^{2}}}{2V{{B}^{2}}}\]
done
clear
C)
\[\frac{2V{{B}^{2}}}{{{E}^{2}}}\]
done
clear
D)
\[\frac{2V{{E}^{2}}}{{{B}^{2}}}\]
done
clear
View Answer play_arrow
Which set is expected to show the smallest difference in first ionisation energy.
A)
He, Ne, Ar
done
clear
B)
B, N, O
done
clear
C)
\[Mg,\text{ }M{{g}^{+}},\text{ }M{{g}^{+2}}\]
done
clear
D)
Fe, Co, Ni
done
clear
View Answer play_arrow
In which of the following set do we have \[s{{p}^{3}}d\] hybridization-
A)
\[Xe{{F}^{2}},\text{ }IB{{r}_{3}},\text{ }Xe{{O}_{3}}\]
done
clear
B)
\[IB{{r}_{3}},SF_{5}^{\oplus },SF_{5}^{\Theta }\]
done
clear
C)
\[Xe{{F}_{2}},\text{ }IB{{r}_{3}},SF_{5}^{\oplus }\]
done
clear
D)
\[SF_{5}^{\oplus }\text{ }\And \text{ }SF_{5}^{\Theta }\]
done
clear
View Answer play_arrow
Which of the following reactions are not possible?
(I) \[{{(C{{H}_{3}})}_{2}}O+B{{F}_{3}}\to \,\,{{(C{{H}_{3}})}_{2}}O\,\,\to \,\,B{{F}_{3}}\] (II) \[{{(Si{{H}_{3}})}_{2}}O+B{{F}_{3}}\to {{(Si{{H}_{3}})}_{2}}O\,\,\to \,\,B{{F}_{3}}\] (III) \[{{H}_{3}}N+B{{F}_{3}}\to \,\,{{H}_{3}}N\to B{{F}_{3}}\] (IV) \[{{(C{{H}_{3}})}_{2}}O+BF_{4}^{\Theta }\,\,\to \,\,{{(C{{H}_{3}})}_{2}}O\to BF_{4}^{\Theta }\]
Correct is-
A)
I, II
done
clear
B)
II, III
done
clear
C)
II, IV
done
clear
D)
Only IV
done
clear
View Answer play_arrow
Which of the following molecule is planar?
A)
\[\left[ I{{\left( CN \right)}_{2}} \right]{{~}^{\Theta }}\]
done
clear
B)
\[PC{{l}_{3}}{{F}_{2}}\]
done
clear
C)
\[PC{{l}_{5}}\]
done
clear
D)
\[S{{F}_{4}}\]
done
clear
View Answer play_arrow
In the complex \[{{\left[ Pt\left( {{O}_{2}} \right){{\left( en \right)}_{2}}\left( Br \right) \right]}^{+2}}\], co- ordination number & oxidation number of platinum are-
A)
4, 3
done
clear
B)
4, 5
done
clear
C)
4, 6
done
clear
D)
6, 4
done
clear
View Answer play_arrow
The pair in which both species have same magnetic moment (spin only value) is-
A)
\[{{\left[ Cr{{({{H}_{2}}O)}_{6}} \right]}^{+2}},\,\,{{\left[ CoC{{l}_{4}} \right]}^{-2}}\]
done
clear
B)
\[{{\left[ Cr{{({{H}_{2}}O)}_{6}} \right]}^{+2}},\,\,{{\left[ Fe{{({{H}_{2}}O)}_{6}} \right]}^{+2}}\]
done
clear
C)
\[{{\left[ Cr{{({{H}_{2}}O)}_{6}} \right]}^{+2}},\,\,{{\left[ Fe{{({{H}_{2}}O)}_{6}} \right]}^{+2}}\]
done
clear
D)
\[{{\left[ CoC{{l}_{4}} \right]}^{-2}},\,\,{{\left[ Fe{{({{H}_{2}}O)}_{6}} \right]}^{+2}}\]
done
clear
View Answer play_arrow
Primary, secondary and tertiary amines can be distinguished by:
A)
Schiff' s test
done
clear
B)
Fehling' s test
done
clear
C)
Hinsberg test
done
clear
D)
Tollens' test
done
clear
View Answer play_arrow
Calcium imide on hydrolysis give gas (P) which on oxidation by bleaching powder give gas (Q). Gas (Q) on reaction with magnesium gives compound(R) which on hydrolysis again give gas (P). Identify (P), (Q), (R).
A)
\[{{N}_{2}},\text{ }N{{H}_{3}},\,\,MgNH\]
done
clear
B)
\[N{{H}_{3}},\,\,{{N}_{2}},\text{ }M{{g}_{3}}{{N}_{2}}\]
done
clear
C)
\[N{{H}_{3}},\text{ }N{{O}_{2}},\,\,Mg{{\left( N{{O}_{2}} \right)}_{2}}\]
done
clear
D)
\[{{N}_{2}},\text{ }{{N}_{2}}{{O}_{5}},\text{ }Mg{{\left( N{{O}_{3}} \right)}_{2}}\]
done
clear
View Answer play_arrow
Which one of the following processes will produce hard water-
A)
Saturation of water with \[CaC{{O}_{3}}\]
done
clear
B)
Addition of \[N{{a}_{2}}S{{O}_{4}}\] to water
done
clear
C)
Saturation of water with \[MgC{{O}_{3}}\]
done
clear
D)
Saturation of water with \[CaS{{O}_{4}}\]
done
clear
View Answer play_arrow
\[PbC{{l}_{4}}\] exist but \[Pb{{I}_{4}}\] does not exist because of-
A)
Large size of \[{{I}^{\Theta }}\]
done
clear
B)
Strong oxidising character of \[P{{b}^{+4}}\]
done
clear
C)
Strong reducing character of \[P{{b}^{+4}}\]
done
clear
D)
Low electronegativity of \[{{I}^{\Theta }}\]
done
clear
View Answer play_arrow
Which of the following does not have S-S-linkage?
A)
\[{{S}_{2}}{{O}_{8}}{{^{-}}^{2}}\]
done
clear
B)
\[{{S}_{2}}{{O}_{6}}{{^{-}}^{2}}\]
done
clear
C)
\[{{S}_{2}}{{O}_{5}}{{^{-}}^{2}}\]
done
clear
D)
\[{{S}_{2}}{{O}_{3}}{{^{-}}^{2}}\]
done
clear
View Answer play_arrow
The compound of Vanadium has magnetic moment of 1.73 B.M. The Vanadium chloride has the formula-
A)
\[VC{{l}_{2}}\]
done
clear
B)
\[VC{{l}_{3}}\]
done
clear
C)
\[VC{{l}_{4}}\]
done
clear
D)
\[VC{{l}_{5}}\]
done
clear
View Answer play_arrow
Both geometrical and optical isomerism are shown by-
A)
\[{{\left[ Co{{(en)}_{2}}C{{l}_{2}} \right]}^{+}}\]
done
clear
B)
\[{{\left[ Co{{(N{{H}_{3}})}_{5}}Cl \right]}^{+2}}\]
done
clear
C)
\[{{\left[ Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}} \right]}^{+}}\]
done
clear
D)
\[{{[Cr{{(ox)}_{3}}]}^{-3}}\]
done
clear
View Answer play_arrow
In which reaction Hs02 act as a reducing agent.
A)
\[2HI+{{H}_{2}}{{O}_{2}}\to \,\,{{I}_{2}}\,\,+\,\,2{{H}_{2}}O\]
done
clear
B)
\[FeS{{O}_{4}}+{{H}_{2}}S{{O}_{4}}+{{H}_{2}}{{O}_{2}}\to \,\,\,F{{e}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}+2{{H}_{2}}O\]
done
clear
C)
\[MnO+{{H}_{2}}{{O}_{2}}\,\,\to \,\,Mn{{O}_{2}}+{{H}_{2}}O\]
done
clear
D)
\[{{\text{I}}_{\text{2}}}+2NaOH\,\,+\,\,{{H}_{2}}{{O}_{2}}\to 2NaI+{{H}_{2}}O+{{O}_{2}}\]
done
clear
View Answer play_arrow
A human body required the \[0.01\,\,\mu \] activity of radioactive substance after 24 hours. Half life of radioactive is 6 hours. Than injection of max. activity of radioactive substance that can be injected:
A)
0.08
done
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B)
0.04
done
clear
C)
0.16
done
clear
D)
0.32
done
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View Answer play_arrow
The shortest wavelength of H-atom in Lyman series is x, then longest wavelength in Balmer series of \[H{{e}^{+}}\] is-
A)
\[\frac{9x}{5}\]
done
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B)
\[\frac{36x}{5}\]
done
clear
C)
\[\frac{x}{4}\]
done
clear
D)
\[\frac{5x}{9}\]
done
clear
View Answer play_arrow
Heavy water is used as
A)
washing water
done
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B)
detergent
done
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C)
drinking water
done
clear
D)
moderator
done
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View Answer play_arrow
Insulin contains \[3.4\,%\] sulphur. What will be the minimum molecular weight of insulin?
A)
94.176
done
clear
B)
1884
done
clear
C)
941.176
done
clear
D)
976
done
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View Answer play_arrow
A solution containing \[10g\text{ }per\text{ }d{{m}^{3}}\] of urea \[\left( molecular\text{ }mass\text{ }=\text{ }60g\text{ }mo{{l}^{-1}} \right)\] is isotonic with a \[5%\] solution of a nonvolatile solute. The molecular mass of this nonvolatile solute is-
A)
\[250g\text{ }mo{{l}^{-}}^{1}\]
done
clear
B)
\[300g\text{ }mo{{l}^{-}}^{1}\]
done
clear
C)
\[350g\text{ }mo{{l}^{-}}^{1}\]
done
clear
D)
\[200g\text{ }mo{{l}^{-}}^{1}\]
done
clear
View Answer play_arrow
Propene on reaction with mCPBA produces-
A)
1, 3-Epoxy propane
done
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B)
1, 2-Epoxy propane
done
clear
C)
2-propanone
done
clear
D)
2-propanol
done
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View Answer play_arrow
Identify the product (Y) in the following reaction sequence:
A)
cyclobutane
done
clear
B)
cyclopentane
done
clear
C)
pentane
done
clear
D)
cyclopentanone
done
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View Answer play_arrow
\[{{H}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\,\,\to \,\,{{H}_{2}}O\,(\ell )\] \[B.E\left( H-H \right)={{x}_{1}},\,\,B.E\left( O=O \right)={{x}_{2}};\,\,B.E\left( O-H \right)={{x}_{3}}\]Latent heat of vaporisation of water liquid into water vapour \[\text{=}\,\,{{x}_{4}}\text{ }then\text{ }\Delta {{H}_{f}}\] (that of formation of water) is-
A)
\[{{x}_{1}}+\frac{{{x}_{2}}}{2}-{{x}_{3}}+{{x}_{4}}\]
done
clear
B)
\[2{{x}_{3}}-{{x}_{1}}-\frac{{{x}_{2}}}{2}-{{x}_{4}}\]
done
clear
C)
\[{{x}_{1}}+\frac{{{x}_{2}}}{2}-2{{x}_{3}}-{{x}_{4}}\]
done
clear
D)
\[{{x}_{1}}+\frac{{{x}_{2}}}{2}-2{{x}_{3}}+{{x}_{4}}\]
done
clear
View Answer play_arrow
4.5 g of aluminium (at. mass 27 amu) is deposited at cathode from \[A{{l}^{3+}}\] Solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from \[{{H}^{+}}\] ions in solution by the same quantity of electric charge will be-
A)
44.8 L
done
clear
B)
11.2 L
done
clear
C)
22.4 L
done
clear
D)
5.6 L
done
clear
View Answer play_arrow
If the bond dissociation energies of XY, Xz and Yz (all diatomic molecules) are in the ratio \[1\text{ }:\text{ }1\text{ }:\text{ }0.5\] and \[{{\Delta }_{f}}H\] of XY is\[-200\text{ }kJ\text{ }mo{{l}^{-1}}\]. The mol dissociation energy of Xs will be-
A)
\[800\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
clear
B)
\[200\text{ }kJ\text{ }mo{{l}^{-1}}\]
done
clear
C)
\[300\,\,kJ\,\,mo{{l}^{-1}}\]
done
clear
D)
\[400\,\,kJ\,\,mo{{l}^{-1}}\]
done
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View Answer play_arrow
In which of the following compounds, the oxidation number of iodine is fractional?
A)
\[I{{F}_{7}}\]
done
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B)
\[I_{3}^{-}\]
done
clear
C)
\[I{{F}_{5}}\]
done
clear
D)
\[I{{F}_{3}}\]
done
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View Answer play_arrow
Among the metals Cr, Fe, Mn, Ti and Mg, the one that cannot by obtained by reduction of metal oxide by aluminium is-
A)
Cr
done
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B)
Fe
done
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C)
Mn
done
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D)
Mg
done
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View Answer play_arrow
A sudden large jump between the values of second and third ionization energy of an element would be associated with the electronic configuration-
A)
\[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{4}}\]
done
clear
B)
\[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{2}}\]
done
clear
C)
\[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{2}}\]
done
clear
D)
\[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\]
done
clear
View Answer play_arrow
The correct formula of salt formed by the neutralization of hypophosphorus acid with \[NaOH\] is-
A)
\[N{{a}_{3}}P{{O}_{3}}\]
done
clear
B)
\[N{{a}_{3}}P{{O}_{2}}\]
done
clear
C)
\[Na{{H}_{2}}P{{O}_{2}}\]
done
clear
D)
\[N{{a}_{2}}HP{{O}_{2}}\]
done
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View Answer play_arrow
In the electrolysis of a \[CuS{{O}_{4}}\] solution, how many grams of \[Cu\] are plated out on the cathode in the time that is takes to liberate 5.6 litre of \[{{O}_{2}}\](g), measured at STP, at the anode?
A)
31.75
done
clear
B)
14.2
done
clear
C)
4.32
done
clear
D)
None of these
done
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View Answer play_arrow
Among the following acids, which has the lowest \[p{{K}_{a}}\] value?
A)
\[C{{H}_{3}}COOH\]
done
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B)
\[HCOOH\]
done
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C)
\[{{\left( C{{H}_{3}} \right)}_{2}}CHCOOH\]
done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}COOH\]
done
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View Answer play_arrow
\[{{(C{{H}_{3}})}_{2}}C=CHC{{H}_{3}}\,\xrightarrow[Heat]{X}\,\,Acetone+AcOH\] In the above reaction X is-
A)
\[KMn{{O}_{4}}/{{H}_{2}}S{{O}_{4}}\]
done
clear
B)
\[{{O}_{3}}\]
done
clear
C)
\[{{C}_{6}}{{H}_{5}}COOH\]
done
clear
D)
\[{{O}_{2}}\]
done
clear
View Answer play_arrow
Which of the following will not react with NaOH?
A)
done
clear
B)
\[{{C}_{2}}{{H}_{5}}OH\]
done
clear
C)
\[C{{H}_{3}}CON{{H}_{2}}\]
done
clear
D)
\[CH{{\left( CN \right)}_{3}}\]
done
clear
View Answer play_arrow
The IUPAC name of the following compound is
A)
2-ethyl-3, 4-dimethylpentanal
done
clear
B)
2, 3-dimethyl-4-aldo hexane
done
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C)
3-aldo-4, 5-dimethyl hexane
done
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D)
1, 3, 4, 5-tetraethyl butanal
done
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View Answer play_arrow
Reagent [A] can be-
A)
\[{{H}_{2}}O/{{H}^{+}}\]
done
clear
B)
\[B{{H}_{3}}.THF/{{H}_{2}}{{O}_{2}}-O{{H}^{-}}\]
done
clear
C)
\[Hg{{\left( OCOC{{H}_{3}} \right)}_{2}}.THF/NaB{{H}_{4}}.NaOH\]
done
clear
D)
all the above are true
done
clear
View Answer play_arrow
Lassaigne?s test for the detection of nitrogen fails in-
A)
\[{{H}_{2}}N-CO-NHN{{H}_{2}}.HCl\]
done
clear
B)
\[N{{H}_{2}}-N{{H}_{2}}.HCl\]
done
clear
C)
\[N{{H}_{2}}-CO-N{{H}_{2}}\]
done
clear
D)
\[{{C}_{6}}{{H}_{5}}-NH-N{{H}_{2}}.HCl\]
done
clear
View Answer play_arrow
Which set of terms correctly identifies the carbohydrate shown?
1. Pentose 2. Hexose 3. Aldose 4. Ketose 5. Pyranose 6. Furanose
A)
1, 3 and 6
done
clear
B)
1, 3 and 5
done
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C)
2, 3 and 5
done
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D)
2, 3 and 5
done
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View Answer play_arrow
Which of the following statements best describes the most stable conformation of trans-1, 3-dimethylcyclohexane?
A)
Both methyl groups are axial
done
clear
B)
Both methyl groups are equatorial
done
clear
C)
One methyl group is axial, the other equatorial
done
clear
D)
The molecule is severely strained and cannot exist
done
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View Answer play_arrow
The major products from the following sequence of reactions are \[{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}N{{(C{{H}_{2}}C{{H}_{3}})}_{2}}\xrightarrow{C{{H}_{3}}I}\xrightarrow[{{H}_{2}}O]{A{{g}_{2}}O}\xrightarrow{heat}\]?
A)
\[{{\left( C{{H}_{3}} \right)}_{2}}CHC{{H}_{2}}N{{H}_{2}}+{{H}_{2}}C=C{{H}_{2}}\]
done
clear
B)
\[{{\left( C{{H}_{3}} \right)}_{2}}NC{{H}_{2}}C{{H}_{3}}+{{H}_{2}}C=C{{\left( C{{H}_{3}} \right)}_{2}}\]
done
clear
C)
done
clear
D)
\[{{\left( C{{H}_{3}} \right)}_{3}}\overset{+}{\mathop{N}}\,C{{H}_{2}}C{{H}_{3}}{{I}^{-}}+{{H}_{2}}C=C{{H}_{2}}\]
done
clear
View Answer play_arrow
A primary amine on treatment with carbon disulphide and \[HgC{{l}_{2}}\] produce
A)
alkyl cyanide
done
clear
B)
alkyl isothiocyanate
done
clear
C)
alkyl cyanate
done
clear
D)
carbylamine
done
clear
View Answer play_arrow
Major product A is-
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
\[HC\equiv CH~~\xrightarrow[H{{g}^{+2}}]{{{H}_{2}}O}\left( A \right)~\xrightarrow[NaOH]{dilute}dilute\left( B \right)\] The compound [B] is-
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Which of the following reagents will not react with above compound?
A)
Na metal
done
clear
B)
\[AgN{{O}_{3}}+N{{H}_{4}}OH\]
done
clear
C)
\[C{{u}_{2}}C{{l}_{2}}+N{{H}_{4}}OH\]
done
clear
D)
\[NaHC{{O}_{3}}\]
done
clear
View Answer play_arrow
If \[20\text{ }c{{m}^{3}}\] gas at 1 atm. is expanded to \[50\text{ }c{{m}^{3}}\] at constant T, then what is the final pressure?
A)
\[20\times \frac{1}{50}\]
done
clear
B)
\[50\times \frac{1}{20}\]
done
clear
C)
\[1\times \frac{1}{20}\times 50\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
Which is most basic?
A)
\[C{{H}_{3}}C{{H}_{2}}-N{{H}_{2}}\]
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Two gases P and Q both decolourise aqueous bromine but only one of them gives white ppt with Tollen?s reagent. P and Q are likely to be
A)
\[{{H}_{2}}C=C{{H}_{2}}\text{ }and\text{ }C{{H}_{3}}-C\equiv C-C{{H}_{3}}\]
done
clear
B)
\[HC\equiv CH\,\,and\,\,C{{H}_{3}}-C{{H}_{2}}-C\equiv CH\]
done
clear
C)
\[HC\equiv CH\,\,and\,\,C{{H}_{3}}-C\equiv CH\]
done
clear
D)
\[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH\,\,and\,\,C{{H}_{3}}-C\equiv C-C{{H}_{3}}\]
done
clear
View Answer play_arrow
Which of the following is an autoimmune disease?
A)
Cancer
done
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B)
Asthma
done
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C)
Erythroblastosis foetalis
done
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D)
Rhematoid heart disease
done
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View Answer play_arrow
The gradient of temperature over surface of earth is-
A. Increase progressively from equator towards pole B. Decrease progressively from pole towards equator C. Increase progressively from pole towards equator D. Decrease progressively from plains to mountain top
How many of the above are correct
A)
1
done
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B)
2
done
clear
C)
3
done
clear
D)
4
done
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View Answer play_arrow
Alcohol is produced by the activities of
A)
Leuconostoc
done
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B)
Saccharomyces cerevisiae
done
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C)
Torulopsis
done
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D)
Clostridium botulinum
done
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View Answer play_arrow
How many ATP are produced during fermentation-
A)
4
done
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B)
6
done
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C)
2
done
clear
D)
Zero
done
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View Answer play_arrow
A leaf primordium grows into adult leaf lamina by means of
A)
At first by apical meristem and later largely by marginal meristems
done
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B)
Apical meristem
done
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C)
Lateral meristem
done
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D)
Marfinal meristems
done
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View Answer play_arrow
The term 'niche' of a species refers to-
A)
Specific and habitual function
done
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B)
Specific place where an organism lives
done
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C)
Competitive power of an organism
done
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D)
Specific function of organism
done
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View Answer play_arrow
In our body, antibodies are formed against pathogens in-
A)
Lymphnodes by Lympho cytes
done
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B)
Liver by RBCs
done
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C)
Blood by platelets
done
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D)
Brain by macrophages
done
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View Answer play_arrow
The subunits of chromatids are:
A)
Chromonemata
done
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B)
Chromomeres
done
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C)
Telomeres
done
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D)
Secondary constrictions
done
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View Answer play_arrow
When the persons die in old age after completing its life span, the survivalship curve is-
A)
J-shaped
done
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B)
Concave
done
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C)
S-shaped
done
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D)
Convex
done
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View Answer play_arrow
In \[{{C}_{4}}\] plants the bundle sheath cells-
A)
Have thin walls to facilitate the gaseous exchange
done
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B)
Have large intercellular spaces
done
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C)
Are rich in PEP carboxylase
done
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D)
Have a high density of chloroplasts
done
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View Answer play_arrow
Match the column I with Column II
Column-I Column-II I Many people have nutrient deficiencies as they cannot buy fruits & vegetables [A] Single cell proteins II Crops with higher vitamins, proteins & fats are breed [B] Micropropagation III Growing microbes as the alternative source of protein [C] Somoclones IV Capacity to generate plant from single cell or explants [D] Hidden hunger V Production of thousand plants through tissue culture [E] Biofortification VI Genetically identical plants [F] Totipotency
A)
I-D, II-E, III-F, IV-A.V-B.VI-C
done
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B)
I-D, II-E, III-F, IV-A, V-B, VI-C
done
clear
C)
I-D, II-E, III-A, IV-F, V-B, VI-C
done
clear
D)
I-F, II-E, III-A, IV-D, V-B, VI-C
done
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View Answer play_arrow
The below diagram shows electrostatic precipitator identify A, B and C
A)
A-Discharge corona, B-Negatively charged wire, C-Collection plate
done
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B)
A-Discharge corona, B-Positively charged wire, C-collection plate grounded
done
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C)
A-Discharge corona, B-Negatively charged, wire, C-Air filters
done
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D)
A-Uncharge corona, B-Positively charged wire, C-Dust removar:
done
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View Answer play_arrow
Cell-mediated immune responses are-
A)
Enhanced by depletion of complement
done
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B)
Enhanced by depletion of T-cells
done
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C)
Suppressed by antihistamine
done
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D)
Suppressed by cortisone
done
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View Answer play_arrow
INDC (Intended Nationally Determined Contribution) of India in Cop-21 is-
A)
\[60-65\text{ }%\] decrease in carbon emission in GDP from level of 2005
done
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B)
\[33-35\text{ }%\] decrease in carbon emission in GDP from level of 2005
done
clear
C)
\[26-28\text{ }%\] decrease in carbon emission in GDP from level of 2005
done
clear
D)
\[6-12\text{ }%\] decrease in carbon emission from level of 1990
done
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View Answer play_arrow
Secondary growth is absent in-
A)
Hydrophytes
done
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B)
Mesophytes
done
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C)
Halophytes
done
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D)
Xerophytes
done
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View Answer play_arrow
In an ecosystem-
A)
Cycling of energy and nutrients is a coupled process
done
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B)
Cycling of energy is an independent process
done
clear
C)
Movement of energy is unidirectional
done
clear
D)
Macro and micronutrients cycle at the same pace
done
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View Answer play_arrow
Which of the following mineral cannot be reutilized by plants-
A)
Ca
done
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B)
S
done
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C)
Mg
done
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D)
P
done
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View Answer play_arrow
In which stage of cell cycle each chromosome have two DNA:
A)
\[{{G}_{1}}\]
done
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B)
\[{{G}_{2}}\]
done
clear
C)
Anaphase-II
done
clear
D)
None of these
done
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View Answer play_arrow
Basal bodies are most closely associated with which one of the following cell components
A)
Nucleus
done
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B)
Cilia
done
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C)
Golgi apparatus
done
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D)
Mitochondria
done
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View Answer play_arrow
Sialic acid is present in:
A)
Chromatids
done
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B)
Golgi bodies
done
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C)
Cell wall
done
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D)
Cell membrane
done
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View Answer play_arrow
Desmosomes are concerned with-
A)
cell adherence
done
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B)
cytolysis
done
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C)
cellular excretion
done
clear
D)
cell division
done
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View Answer play_arrow
The study of chromosomes at meiotic diplotene shows that
A)
The intimately paired chromosomes repel each other and begin to separate
done
clear
B)
The pairing of homologous chromosomes which had initiated in the earlier stage is completed
done
clear
C)
The homologous chromosomes remain united by chiasmata
done
clear
D)
None of the above
done
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View Answer play_arrow
Few events regarding meiosis-I is given below
A The chromosome gradually visible under light microscope during zygotene B. Bivalent are formed by a pair of synapsed homologous chromosome during pachytene C. Recombinase enzyme is involved in nonhomologous chromosome recombination during pachytene D. Chromosome pairing occurs during laptotene E. Chiasma is formed during diplotene
How many of these statement are true-
A)
Three
done
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B)
Four
done
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C)
Two
done
clear
D)
One
done
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View Answer play_arrow
When volume of body increases due to increase in the volume of cells, not in the number of cells, then it is called 'auxetic growth'. Such growth is found in-
A)
Lizards
done
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B)
Men
done
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C)
Frogs
done
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D)
Nematodes
done
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View Answer play_arrow
In which of the following stage of cell division, DNA content and chromosome number is equal to haploid-
A)
Anaphase
done
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B)
Telophase
done
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C)
Telophase-I
done
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D)
Telophase-II
done
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View Answer play_arrow
Kidneys of mammals are present on either side of vertebral column at the level of-
A)
10th thoracic to 3rd lumbar vertebrae
done
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B)
12th thoracic to 5th lumbar vertebrae
done
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C)
12th thoracic to 3rd lumbar vertebrae
done
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D)
10th thoracic to 5th lumbar vertebrae
done
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View Answer play_arrow
A. ICBN is used for naming of plant and bacteria. B. Taxonomic key are tools that help in classification of organism only. C. Animal species are more than plant species D. All living organism are linked to one another by sharing common genetic material.
A)
A, B, C & D are correct
done
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B)
A, C & D are true
done
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C)
A & C are true
done
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D)
C & D are true
done
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View Answer play_arrow
Taxonomic key is based on the set of contrasting characters known as-
A)
Lead
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B)
Doublet
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C)
Couplet
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D)
Catalogues
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Floral formula of ray floret in compositae
A)
\[Br\,\overset{{}^\circ }{\mathop{\,A}}\,\,\,K\,p\,\,{{C}_{(5)}}\,{{A}_{0\,}}{{G}_{(2)}}\]
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B)
\[Br%\,\,\,K\,p\,\,{{C}_{(4)}}\,{{A}_{0\,}}{{G}_{(2)}}\]
done
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C)
\[Br%\,\,\,Kp\,{{C}_{(5)}}\,{{A}_{0\,}}{{G}_{(2)}}\]
done
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D)
\[Br\overset{{}^\circ }{\mathop{\,A}}\,K{{p}_{(4)}}\,{{A}_{0\,}}{{G}_{(2)}}\]
done
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One direct use of earthworms to farmers is-
A)
Allowing sunlight to pass in upper layers of soil
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B)
Enrichment of soil by nephridial excretion
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C)
Removal of dead leves
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D)
Killing of some harmful insects
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Fungi that help in decomposition of litter and mineral cycling basically belong to-
A)
Bracket fungi
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B)
Sac fungi
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C)
Imperfect fungi
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D)
Lichens
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Orange rots is due to member of-
A)
Phycomycetes
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B)
Ascomycetes
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C)
Basidiomycetes
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D)
Deuteromycetes
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Bulbil is a modification of-
A)
Underground stem
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B)
Bases of leaves
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C)
Buds
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D)
Radicle
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1. Isogamy, oogamy or anisogamy 2. Stored food complex polysaccharide 3. Bitlagellated or tetraflagellated zoospore 4. Vacoulated cytoplasm 5. Isokont flagella
Which of the above mentioned character are present in pheophyceae?
A)
1, 2, 3, 4
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B)
1, 2, 4
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C)
1, 2, 4, 5
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D)
1, 2
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Which of the following is commonly present in fresh water?
[a] Ulothrix [b] Spirogyra [c] Ectocarpus [d] Baterachospermem
A)
A & B
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B)
A, B & D
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C)
A, B, C & D
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D)
A, B & C
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A. True root stem or leaves are not present B. Female sex organ is known as archegonium C. Unicellular or multicellular rhizoid are present D. Union of gametes occur in free water
Which of the above mentioned character are common in thallophyta and bryophyte both?
A)
A & D
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B)
A, B & D
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C)
Only A
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D)
Only D
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The female hormone that causes deposition of fat in the breast and hips and the growth of pubic hairs during puberty is-
A)
Estrogen
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B)
Progesterone
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C)
LH
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D)
FSH
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Pew diagram are given below. How many of the following belongs to monocot plant only
A)
Two
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B)
Three
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C)
One
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D)
Zero
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Which of the following is true regarding collenchyma
A)
It form major bulk of ground tissue in dicot stem
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B)
It is a mechanical and physiological tissue
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C)
It provide mechanical support to leaf petiole and leaf base
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D)
All of the above
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In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be-
A)
Haploid
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B)
Diploid
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C)
A few haploid and a few diploid
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D)
With varying ploidy
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Which of the following is not a stem modification?
A)
Phyllode
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B)
Cladode
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C)
Phylloclade
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D)
None of the above
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Floral character which is described by floral formula but not by floral diagram
A)
Placentation
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B)
Position of ovary
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C)
[a] & [b] both
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D)
Astivation
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Match the given below organelles with their function
I II a. Krebs cycle i. Stalked particles of mitochondria b. Photorespiration ii. Cytoplasm c. Oxidative iii. Peroxisomes d. Glycolysis iv. Inner surface of membrane of mitochondria
A)
a-ii b-iii c-iv d-i
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B)
a-i b-ii c-iii d-iv
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C)
a-iv b-iii c-i d-ii
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D)
a-iii b-ii c-iv d-i
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Few character regarding china rose is given below.
Which and how many are observed in china rose?
A)
Three A, C & E
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B)
Four A, B, C & D
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C)
Three A, C & D
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D)
Two A & C
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Whom among the following are known for their work on plant breeding in India?
A)
M. S. Swaminathan and B. P. Pal
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B)
M. S. Swaminathan and B. P. Pal and N. E. Borlaug
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C)
G. A. Gani, B. S. Kadam and N. E. Borlaug
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D)
M. S. Swaminathan and N. E. Borlaug
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Match the following
Column-I Column-II A SNPs (i) 3164.7 million B Genes of chromosomes N.1 (ii) 1.4 million C Total No. of Human genes (iii) 30000 D Total nucleotides of human genome (iv) 2968
A)
A-ii B-iii C-iv D-i
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B)
A-ii B-iv C-iii D-i
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C)
A-ii B-iv C-i D-iii
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D)
A-iv B-ii C-iii D-i
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Which of the following will be included under innate immunity?
A)
Mucus membrane
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B)
Interferon
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C)
Natural killer cells
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D)
All of these
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Match the list-
List-I List-II A. Diameter of the helix 1. \[34\overset{{}^\circ }{\mathop{A}}\,\] B. Distance between two adjacent 2. \[20\overset{{}^\circ }{\mathop{A}}\,\] C. Distance between two complete turns 3. \[3\overset{{}^\circ }{\mathop{A}}\,\] D. Length of the hydrogens 4. \[4.4\overset{{}^\circ }{\mathop{A}}\,\]
A)
A=1, B=3, C=2, D=4
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B)
A=2, B=4, C=1, D=3
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C)
A=4, B=2, C=3, D=1
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D)
A=1, B=4, C=2, D=3
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Factors which determine polarity of eggs are-
A)
Direct electric current
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B)
Presence of neighbouring eggs
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C)
Position of sperm entry
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D)
Unequal distribution of substances in egg
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In DNA finger printing-
A)
Restriction enzyme digests or generate unique fragments
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B)
The polymerase chain reaction amplifies fewer DNA
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C)
The variability of repeated sequences between two restriction sites is evaluated
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D)
All of these
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For a T-cell to recognize an antigen it must interact with-
A)
Complement
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B)
B cell
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C)
A macrophage
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D)
All of the above
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Match the column-I with column-II and identify the correct match-
Column-I Column-II A. Cytidine P. Nucleoside B. Lecithin Q. Nucleotide C. Alanine R. Phospholipid D. Uracil S. Amino acid E. Trypsin T. Nitrogen base U. Enzyme
A)
A = P, B = R, C = S, D = T, E = U
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B)
A = Q, B = R, C = S, D = T, E = U
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C)
A = P, B = R, C = S, D = Q, E = U
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D)
A = Q, B = R, C = S, D = P, E = U
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Interferons are-
A)
Antiviral proteins
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B)
Antibacterial proteins
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C)
Anticancer proteins
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D)
None of above
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If two persons with heterozygous A and B blood group marries, then possibility of genotypes in their progeny are-
A)
\[Only\,\,{{I}^{0}}{{I}^{0}}\]
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B)
\[Only\,\,{{I}^{A}}{{I}^{B}}\]
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C)
\[{{I}^{A}}{{I}^{0}}\,\,and\,\,\,{{I}^{B}}{{I}^{0}}\]
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D)
All the above
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The possible blood groups of children bom to parents having A x AB groups are-
A)
O, A, B
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B)
O, A, B, AB
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C)
O, A
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D)
A, B, AB
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If \[{{6}^{n}}\] is the number of genotypes where 'n' is the number of different chromosome pairs with each carrying one heterozygous alleles. What would be the different genotypes produced by garden pea plant?
A)
\[{{6}^{10}}\]
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B)
\[{{6}^{12}}\]
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C)
\[{{6}^{14}}\]
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D)
\[{{6}^{7}}\]
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Each immunoglobin has two heavy chains & two light chains, the antigen binding site is present in-
A)
Variable region of heavy chain
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B)
Variable region of both heavy and light chain
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C)
Variable region of light chain
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D)
Constant region of both light and heavy chain
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Active immunity is obtained by-
A)
Natural resistance
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B)
Antibiotics
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C)
Weakened germs infection
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D)
None of these
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Genotype of male plant is \[{{S}_{2}}{{S}_{3}}\] while of female plant is\[{{S}_{1}}{{S}_{2}}\]. Which of the following pollen grain is comptible for the stigma of given female plant
A)
\[{{S}_{1}}\]
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B)
\[{{S}_{2}}\]
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C)
\[{{S}_{3}}\]
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D)
\[Both\,\,{{S}_{2}},\,\,{{S}_{3}}\]
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Which of the following immunity is conferred by transfer of immune products like antibodies from another individual into a non-immune individual?
A)
Adaptive immunity
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B)
Specific immunity
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C)
Active immunity
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D)
Passive immunity
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View Answer play_arrow
Which of the following statement is incorrect w.r.t. fishes?
A)
Cartilaginous fish like shark has placoid scales
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B)
Ammocoete larva of true fishes (after metamorphosis) shows anadromous migration
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C)
Lateral line system is well developed in fishes
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D)
In sea horse, male bears a brood pouch
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Tick mark the incorrect match
A)
Antennal gland - Crayfish
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B)
Metanephridia - Earthworm
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C)
Protonephridia - Planaria
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D)
Malpighian corpuscle - Cockroach
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Select the correct statement w.r.t. anatomical structure of cockroach?
A)
Ventral diaphragm in the haemocoel is non-perforated
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B)
Chitinous membrane is permeable to digestive enzyme and digested substance
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C)
Collateral gland forms outermost covering of ootheca
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D)
Crystalline cone of ommatidium is made up of 4 type of conical cells
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Which of the following will not make minerals more available to plants-
A)
Increasing the rainfall in a wet forested area
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B)
Raising the pH of a very acidic soil
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C)
Tillering a packed - down or water - logged soil
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D)
Introducing fungi that can form mycormiza into a soil that lacks them
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Which one of the following is correctly matched?
A)
Gout - Painful urination
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B)
Ketonuria - Presence of P-hydroxy butyric acid and acetone in urine
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C)
Nephroptosis - Dropping of the kidney, floating kidney
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D)
Oligouria - Presence of albumin in urine
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Osmosis is driven by following factor(s)
A)
density
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B)
pressure difference
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C)
solute concentration
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D)
both ?b and ?c
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Cochlea is composed of three parallel fluid-filled canals separated by Reissners membrane and basilar membrane. Which of the following canal is filled with endolymph?
A)
Median canal
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B)
Vestibular canal
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C)
Tympanic canal
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D)
Helicotrema
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If zona pellucida is digested during morula stage in fallopian tube then which of the following condition is likely to happen?
A)
It leads to ectopic pregnancy
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B)
Mobility is affected
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C)
Cleavage is affected
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D)
Corona radiata behaves like zona pellucida
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When an Amoeba comes near it's food, it stop moving and Pseudopodia are formed above, below and on the sides of food to form a food cup, which does not touch the food. Finally edges of food cup fase around the food to form a non-contractile food vacuole. The above method of ingestion is used by Amoeba to-
A)
Capture a immobile prey
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B)
Capture a live prey
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C)
Protection itself from enemy
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D)
Capture a prey
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Which of the following are examples of hormone releasing IUDs?
A)
CuT, Multiload 375
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B)
Progestasert, LNG-20
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C)
Lippes loop
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D)
Mala-D and Mala-N
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In Chlamydomonas the meiosis occurs in-
A)
Gamete
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B)
Zygote
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C)
Sporogonium
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D)
Zoospore
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Hb-F has a higher affinity for \[{{O}_{2}}\], because
A)
It binds BPG less strongly
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B)
Its oxygen haemoglobin dissociation curve appears on the left side
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C)
Hb-F can carry up to \[30%\] more \[{{O}_{2}}\] than maternal Hb-A
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D)
It having gamma polypeptide chain
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It causes cancer of vagina-
A)
Cadmium oxide
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B)
Diethylstibestrol
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C)
Afflatoxin
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D)
Vinylchloride
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The spaces in between the trabeculae of long bone, contain highly vascularised red bone marrow which takes part in forming erythrocytes and granular leucocytes. It is not present in which of the following?
A)
Proximal ends of long bones
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B)
Vertebrae
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C)
Skull bones
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D)
Clavicles
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Which of the following epithelium, serves to expel secretions, such as sweat, milk and saliva from the sweat gland, mammary gland and salivary glands respectively?
A)
Glandular epithelium
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B)
Myoepithelium
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C)
Neurosensory epithelium
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D)
Holocrine glands
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Which of the following property of plasma membrane of erythrocyte helps in hamburger phenomenon-
A)
Chloride shift
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B)
Haldane effect
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C)
Bohr effect
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D)
Donan Phenomenon
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The indusium in Pteridium is-
A)
True outside and false inside
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B)
Always true
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C)
False outside and true inside
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D)
Always false
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In the anal region, the mucous membrane is thrown into longitudinal folds called as
A)
Crypts of Lieberkuhn
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B)
Column of Bertini
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C)
Folds of kerkrings
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D)
Rectal columns of Morgagni
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Which statement is incorrect w.r.t. muscle structure and muscle contraction?
A)
Zwischenschiebe line and Dobie?s line are synonymous to each other
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B)
Temperature above \[42{}^\circ C\] produces heat rigor due to coagulation of proteins present a in the muscle
done
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C)
The resting muscle membrane is permeable to \[\,{{K}^{+}}\] but not to\[N{{a}^{+}}\].
done
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D)
In case of rigor mortis the muscle loses its excitability, shortens in length, gradually becomes soft and pH of muscle increases
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Metacarpophalangeal joints allow the movement in two directions, it is an example of which type of joint?
A)
Angular/Ellipsoid joint
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B)
Gliding joint
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C)
Pivotal joint
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D)
Ball and socket joint
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Which of the following is common to both avian and mammalian development?
A)
Primitive streak
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B)
Trophoblast
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C)
Holoblastic cleavage
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D)
Yolk plug
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Human heart is myogenic and it is supplied with sympathetic and vagus nerve branches that are acceleratory and inhibitory in nature respectively. Which one of the following statement is incorrect w.r.t. the heart beat?
A)
In foetal heart the heart rate is \[140-130\] beats per minute
done
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B)
Mental status such as depression and grief decrease heart rate
done
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C)
An excess of \[C{{a}^{++}}\] ion decreases heart beat rate
done
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D)
High levels of \[N{{a}^{+}}\text{ }and\text{ }{{K}^{+}}\] decreases the strength of contraction
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Which of the given function is related to parasympathetic nervous system?
a. Constriction of pupil b. Stimulates secretion of gastric juice c. Relaxes urinary bladder d. Inhibits perspiration
A)
a and d only
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B)
a, c, d
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C)
a, b, d
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D)
a, b, c, d
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During the accomodation reflex for near objects, which of the following does not happen?
A)
The third cranial nerve of parasympathetic nervous system causes contraction of the ciliary muscles
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B)
There is slackening of suspensory ligaments
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C)
The radius of curvature increases
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D)
The lens increases its curvature due to elasticity and its power is enhanced
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Which of the following unicellular organism has a macro-nucleus for trophic function and one or more micro-nuclei for reproduction?
A)
Euglena
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B)
Amoeba
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C)
Paramecium
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D)
Typanosoma
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A fight or flight response in the body is controlled by the
A)
Somatic nervous system
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B)
Release of acetylcholine from post-ganglion neuron
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C)
Parasympathetic division of the nervous system
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D)
A sympathetic division of the nervous system
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View Answer play_arrow
Find out the incorrect statement
A)
Darwin perceived an important connection between natural selection and the capacity of organisms to over reproduce
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B)
The unequal ability of individuals to survive and reproduce is natural selection
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C)
Evolution can be measured only as changes in variations in a population of same generation
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D)
Natural selection can lead to the adaptation of organisms to their environment
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View Answer play_arrow
The disadvantage of parthenogenesis is-
A)
Establishment of polyploid generation
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B)
Elimination of variety in population
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C)
Means of reproduction
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D)
Does not encourage the appearance of new and advantageous combinations of genes
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View Answer play_arrow
What is the DPD of a cell having \[OP\,\,=\,\,10\] and \[T.P.=4\]:
A)
10
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B)
4
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C)
14
done
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D)
6
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View Answer play_arrow
Following are the steps in MOET programmes for herd improvement in which a cow has been administered hormones with FSH like activity
A. Transferred to surrogate mother B. It is either mated with an elite bull or artificially inseminated C. Fertilised eggs at 32 cell stage are recovered non-surgically D. It produces 6-8 eggs instead of one egg which they normally yield per cycle
The correct sequence is
A)
B, D, C, A
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B)
D, B, C, A
done
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C)
A, D, C, B
done
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D)
A, B, C, D
done
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