# Solved papers for AMU Medical AMU Solved Paper-1996

### done AMU Solved Paper-1996

• question_answer1) A block of mass m is released from the position A and moves on a frictionless surface as shown. The kinetic energies at positions B, C and D are${{K}_{B}},{{K}_{C}}$and${{K}_{D}}$respectively. Pick out the wrong statement from the following

A) ${{K}_{B}}=2{{K}_{C}}$

B) ${{K}_{D}}=10\,mg$

C) ${{K}_{B}}+{{K}_{C}}={{K}_{D}}$

D) $({{K}_{B}}+{{K}_{C}})<{{K}_{D}}$

• question_answer2) Particle A makes a perfectly elastic collision with another particle B at rest. They fly apart in opposite directions with equal -velocities. The ratio of their masses${{m}_{A}}/{{m}_{B}}$is

A) 1/2

B) 1/3

C) 1/4

D) 1/5

• question_answer3) A homogeneous chain of length L lies on a table. If the coefficient of friction is$\mu$, the maximum length of the chain that can hang over the table is

A) $\frac{\mu L}{1-\mu }$

B) $\frac{\mu L}{1+\mu }$

C) $\frac{L}{\mu }$

D) $\frac{L}{1+\mu }$

• question_answer4) A body of mass 10 kg is lying on a rough plane inclined at an angle of$30{}^\circ$to the horizontal and the coefficient of friction is 0.5. The minimum force required to pull the body up the plane is

A) 0.914 N

B) 9.14 N

C) 91.4 N

D) 914 N

• question_answer5) A stuntman plans to run across a rooftop and then horizontally off it to land on the roof of the next building. The roof of the next building is 4.9 m below the first one and 6.2 m away from it. What should be his minimum speed, in m/s, so that he can successfully make the jump

A) 3.1

B) 4.1

C) 4.9

D) 6.2,

• question_answer6) Two forces of magnitudes 8 N and 15 N respectively act at a point so as to make the resultant force of 17 N. The angle between the forces has to be

A) $45{}^\circ$

B) $60{}^\circ$

C) $90{}^\circ$

D) $120{}^\circ$

• question_answer7) A body of mass 100 g is sliding from an inclined plane of inclination$30{}^\circ$. What is the frictional force experienced if$\mu =0.7$?

A) $0.7\times \sqrt{2}\times \frac{1}{\sqrt{3}}N$

B) $0.7\times \sqrt{3}\times \frac{1}{2}N$

C) $0.7\times \sqrt{3}N$

D) $0.7\times 2\times \frac{1}{\sqrt{3}}N$

• question_answer8) A ball is thrown up, it reaches a maximum height and then comes down. If ${{t}_{1}}$and $({{t}_{2}}>{{t}_{1}})$are the times that the ball takes to be at a particular height then the time taken by the ball to reach the highest point is

A) ${{t}_{1}}+{{t}_{2}}$

B) ${{t}_{2}}-{{t}_{1}}$

C) $\frac{{{t}_{2}}-{{t}_{1}}}{2}$

D) $\frac{{{t}_{1}}+{{t}_{2}}}{2}$

• question_answer9) Which of the following graphs can possibly represent a one-dimensional motion?

A) I

B) II

C) III

D) IV

• question_answer10) The radiation emitted per unit time by unit area of a black body at temperature $T$is $\sigma {{T}^{4}}$ where a is the Stefan-Boltzmann constant. The constant$\sigma$can also be expressed in terms of Boltmanns constant (k). Plancks constant (h) and speed of light as$\sigma =A{{k}^{a}}{{h}^{\beta }}{{c}^{\gamma }},$where $A,\alpha ,\beta$and $\gamma$are dimensionless constants. The set $(\alpha ,\beta ,\gamma )$is given by

A) $(4,-3,-2)$

B) $(-4,-3,\text{ }2)$

C) $(4,3,2)$

D) $(-4,-3,-2)$

• question_answer11) An ideal gas with pressure${{P}_{1}},$volume V and temperature T is expanded isothermally to a volume$2V$and a final pressure P. The same gas is expanded adiabatically to a volume 2V, the final pressure is${{P}_{A}}$. In terms of the ratio of the two specific heats for the gas$\gamma$the ration${{P}_{1}}/{{P}_{A}}$is

A) ${{2}^{\gamma -1}}$

B) ${{2}^{1-\gamma }}$

C) $2\gamma$

D) ${{2}^{\gamma }}$

• question_answer12) The graph between potential energy Hand the intermolecular separations is as shown. The force between the molecules at the points A, B and C respectively is

A) attractive, zero, repulsive

B) zero, repulsive, attractive

C) zero, attractive, repulsive

D) repulsive, zero, attractive

• question_answer13) The density of ice is 0.9 g/cc and that of sea water is 1.1 g/cc. An iceberg of volume V is floating in sea water. The fraction of iceberg above water level is

A) $1/11$

B) $2/11$

C) $3/11$

D) $4/11$

• question_answer14) A planet has its mass and radius twice that of earth. If the acceleration due to gravity on the surface of earth is${{g}_{e}}$and that on the surface of the planet is${{g}_{p}},$the ratio$\frac{{{g}_{e}}}{{{g}_{p}}}$is

A) $1/2$

B) $\sqrt{{}}2$

C) 2

D) 4

• question_answer15) The angular speed of earth in rad/s so that the objects on equator may appear weightless (taking$g=10\text{ }m/{{s}^{2}}$and radius of earth$=6400$ km) is

A) $1.56$

B) $1.25\times {{10}^{-1}}$

C) $1.56\times {{10}^{-3}}$

D) $1.25\times {{10}^{-3}}$

• question_answer16) The angular momentum of a rotating body is along the axis of its rotation. Its moment of inertia about this axis is 8 gem2. If its kinetic energy is 10 J, the magnitude of angular momentum, in S.I units, is

A) $4\times {{10}^{-3}}$

B) $1.6\times {{10}^{-5}}$

C) $4\times {{10}^{-6}}$

D) 4

• question_answer17) A particle of mass m is bound by a linear potential$U=kr$($k=a$constant) and moves in a circular orbit of radius r. Its energy is

A) $kr$

B) $3/2kr$

C) $2kr$

D) $4kr$

• question_answer18) A particle, moving in a plane, is acted upon by a force of constant magnitude that is always perpendicular to the velocity of the particle. Pick out the correct statement/statements from the following (i) acceleration is constant (ii) kinetic energy is constant (iii) velocity is constant (iv) the particle moves in a circular path

A) (iv) only

B) (iii) and (iv)

C) (ii) and (iv)

D) all statements

• question_answer19) Two particles of masses${{m}_{1}}$and${{m}_{2}}$( with${{m}_{1}}>{{m}_{2}}$), initially at rest, move towards each other under an inverse square law force of attraction. Choose the correct statement about the center of mass (CM)

A) the CM moves towards${{m}_{1}}$

B) the CM moves towards${{m}_{2}}$

C) the CM remains at rest

D) the motion of the CM is accelerated

• question_answer20) If the kinetic energy of a body is increased by 300 %, the momentum of the body is increased by

A) 50%

B) 100%

C) 200%

D) 300%

• question_answer21) If the electric dipole moment (of magnitude$6.2\times {{10}^{-30}}m$) of a water molecule is initially pointing in a direction opposite to that of an electric field of magnitude$1.5\times {{10}^{-4}}N/C$ The work done by the field in rotating the molecule into alignment with the field.

A) $-1.9\times {{10}^{25}}J$

B) zero

C) $9.5\times {{10}^{-26}}J$

D) $1.9\times {{10}^{-25}}J$

• question_answer22) The electic potentials (in volts) at four points A,B,C and D are depicted in the figure. On which of the following paths will the work done on a charge of$+2C$be maximum. \begin{align} & \bullet (+2V) \\ & \,\,\,\,\,D \\ \end{align} \begin{align} & \bullet (-3V) \\ & \,\,\,\,\,C \\ \end{align} \begin{align} & \bullet (+1V) \\ & \,\,\,\,\,B \\ \end{align} \begin{align} & \bullet (-1V) \\ & \,\,\,\,\,A \\ \end{align}

A) ABC

D) BC

• question_answer23) A cube has its five sides grounded. The sixth side, insulated from the others, is held at an electric potential${{V}_{0}}.$The potential at the centre of the cube will be

A) zero

B) $\frac{{{V}_{0}}}{6}$

C) $\frac{{{V}_{0}}}{5}$

D) $\frac{{{V}_{0}}}{3}$

• question_answer24) Gauss law would be invalid if

A) there were magnetic monopoles

B) the inverse square law was not exactly true

C) the speed of light was not a universal constant

D) the electriqal charge was not quantized

• question_answer25) An open organ pipe and a closed organ pipe are tuned to the same tuning fork. The lengths of the open and closed pipes are in the ratio of

A) $1:2$

B) $4:1$

C) $3:1$

D) $2:1$

• question_answer26) Transverse wave traveling on a rope is expressed by the equation $y=10\sin (4\pi t-0.02\pi x)$where$x,$y are in cms and$t$is in second. The wavelength and the maximum velocity of a particle in the rope are given in cm and cm/s, respectively by

A) $50,\text{ }40\pi$

B) $100,\text{ 4}0\pi$

C) $100,\text{ 2}0\pi$

D) $100,\text{ 8}0\pi$

• question_answer27) The vertical harmonic oscillations of three spring systems are shown in figures I, II and III. If all the springs are identical each having a force constant k. The ratio of the time periods of the systems is

A) $1:\sqrt{{}}2:\frac{1}{\sqrt{{}}2}$

B) $1:\sqrt{{}}2:\sqrt{{}}2$

C) $\sqrt{{}}2:1:\frac{1}{\sqrt{{}}2}$

D) $\sqrt{{}}2:1:2$

• question_answer28) Some examples of periodic motion are 1. A seconds pendulum 2. Human pulse, 3, Alternating current 4. Earths rotation about its own axis. 5. Moon moving round the earth. Which of the following sequence arranges the time periods of these motions in correct increasing order?

A) $1\text{ }2\text{ }3\text{ }4\text{ }5$

B) $2\text{ }1\text{ }3\text{ }4\text{ }5$

C) $3\text{ }2\text{ }4\text{ }1\text{ }5$

D) $3\text{ }2\text{ }1\text{ }4\text{ }5$

• question_answer29) A Carnots reversible engine converts 1/6 of heat input into work. When the temperature of the sink is reduced by 62 K. The efficiency of Carnots cycle becomes 1/3. The temperatures of the source and the sink, in degree Kelvin, are respectively

A) 372, 310

B) 472, 410

C) 310, 372

D) 744, 682

• question_answer30) An ideal mono atomic gas is taken round the cycle ABCDA as shown in the PV diagram. The work done during the cycle is

A) zero

B) 1/2 PV

C) PV

D) 2PV

• question_answer31) When an object is at distances${{u}_{1}}$and${{u}_{2}}$from a lens a real image and a virtual image is formed respectively having the same magnification. The focal length of the lens is

A) ${{u}_{1}}+\frac{{{u}_{2}}}{2}$

B) $\frac{{{u}_{1}}-{{u}_{2}}}{2}$

C) $\frac{{{u}_{1}}+{{u}_{2}}}{2}$

D) ${{u}_{1}}+{{u}_{2}}$

• question_answer32) Which of the following electromagnetic radiations suffers least diffraction on passing through a narrow aperture?

A) ultraviolet rays

B) green light

C) infrared rays

D) gamma rays

• question_answer33) In an A.C. circuit the potential differences across an inductance and resistance joined in series are 12V and 16V respectively. The total potential difference across the circuit, in volts, is

A) 39.2

B) 36

C) 20

D) 4

• question_answer34) The average power delivered to an A.C circuit by the source of emf is maximum when circuit is

A) purely inductive

B) purely resistive

C) purely capacitive

D) series LCR away from resonance.

• question_answer35) In the given diagram XY is a solenoid of insulated wire Fix on a cardboard tube and PQ is a soft iron cylinder. The current is switched on and is in the direction indicated by the arrows. Which of the following pair of poles is correct?

A) X is north and P is south

B) X is north and P is north

C) Y is north and P is north

D) Y is south and P is south

• question_answer36) A wire of given length is first bent in a single circular loop. Next, it is bent in three loops. If the same current is passed in both the cases, the ratio of magnetic fields (in the first to the second situation) at their centers is

A) 9

B) $1/3$

C) $1/4$

D) $1/9$

• question_answer37) A rectangular loop carrying a current$i$is situated near a long straight wire, such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current$I$is established in the wire as shown in the diagram, the loop will

A) move away from the wire

B) rotate about an axis parallel to wire

C) remain stationary

D) move towards the wire

• question_answer38) In an experiment to determine the electrochemical equivalent (ECE) of copper using a copper voltameter the time current graph is as shown. If the mass deposited in 30 minutes is m grams, the ECE of copper, in g/C is

A) $\frac{m}{120}$

B) $\frac{m}{60}$

C) $\frac{m}{30}$

D) $\frac{m}{2}$

• question_answer39) In the given circuit current in the arm BD is

A) zero

B) $I/2$

C) $I$

D) $2I$

• question_answer40) Consider the statements A: Internal resistance of a cell depends on the distance between the plates but the emf does not. B: The emf of a cell does not depend on the area of the electrodes but the internal resistance does. Pick out the correct statement/statements:

A) only A

B) only B

C) both A and B

D) neither A nor B

• question_answer41) Photons cannot escape from the surface of a

A) white dwarf

B) red giant

C) pulsar

D) black hole

• question_answer42) The gate corresponding to the following truth table is called

 Inputs Output 0 0 0 0 1 1 1 0 1 1 1 0

A)  NAND

B)  NOR

C)  AND

D)  XOR

• question_answer43) In an insulator, the forbidden energy gap between the valence band and the coduction hand is of the order of

A) 0.1 MeV

B) 0.1 keV

C) 5 eV

D) 1 eV

• question_answer44) Consider the nuclear reaction${{X}^{200}}\to {{Y}^{100}}+{{Z}^{90}}+$energy. If the binding energies per nucleon for the nuclei X, Y and Z are 7.4 MeV, 8.2 MeV and 8.2 MeV respectively the energy released, in MeV, is

A) 200

B) 160

C) 110

D) 90

• question_answer45) A freshly prepared radioactive sample of half life 2 hours emits radiations of intensity that is 64 times the permissible safe limit. The minimum time after which it would be possible to work safely with this source is

A) 36 hours

B) 24 hours

C) 12 hours

D) 10 hours

• question_answer46) The first excited state of hydrogen atom is 10.2 eV above its ground state. The temperature needed to excite the hydrogen atom to the excited state will be of the order of

A) ${{10}^{3}}K$

B) ${{10}^{5}}K$

C) ${{10}^{6}}K$

D) ${{10}^{8}}K$

• question_answer47) Imagine a Youngs double slit interference experiment performed with electron waves associated with fast moving electrons coming from an electron gun. The distance between successive maxima will decrease if the

A) accelerating voltage in electron gun is increased

B) accelerating voltage is decreased

C) distance between the screen and the. slits is increased

D) distance between the slits is decreased

• question_answer48) For three different metals A,B,C photoemission is observed one by one. The graphs of maximum kinetic energy$({{K}_{\max }})vs$frequency of incident radiation (i)) are sketched as

 (I) (II) (III) (IV)
Which one of these represents the correct situation?

A) I

B) II

C) III

D) IV

• question_answer49) A beam of light of wave length 6000 A from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of the central bright fringe is

A) 2.4 cm

B) 1.2 cm

C) 2.4 mm

D) 1.2 mm

• question_answer50) The focal length of the objective of an astronomical telescope is 1.0 m if the magnifying power of the telescope is 20 the length of the telescope for relaxed eye in cm is

A) 95

B) 105

C) 120

D) 125

• question_answer51) Which of the following statements is incorrect?

A) activation energy for the forward reaction equals activation energy for the reverse reaction

B) for a reversible reaction, an increase in temperature increases the reaction rate for both the forward and backward reactions

C) the larger the initial reactant concentration for a second order reaction, the shorter is its half life

D) when average rate is infinitesimally small, the average rate equals the instantaneous rate

• question_answer52) A vessel that holds 4.0 g of oxygen at STP will be able to contain the following weight of helium at STP

A) 4.0 g

B) 1.0 g

C) 0.5 g

D) 2.0 g

• question_answer53) Oxidation number of carbon in$C{{H}_{2}}C{{l}_{2}}$is

A) $-4$

B) $+4$

C) 0

D) $-2$

• question_answer54) Which of the following halides is the most stable?

A) $C{{F}_{4}}$

B) $C{{l}_{4}}$

C) $CB{{r}_{4}}$

D) $CC{{l}_{4}}$

• question_answer55) Which of the following combinations of quantum numbers are allowed?

A) $_{3}^{N}\,\,\,\,\,\,\,\,\,\,\,\,\,_{2}^{l}\,\,\,\,\,\,\,\,\,\,\,\,\,_{1}^{{{m}_{1}}}\,\,\,\,\,\,\,\,\,\,_{1}^{{{m}_{s}}}$

B) $_{2}^{N}\,\,\,\,\,\,\,\,\,\,\,\,\,_{0}^{l}\,\,\,\,\,\,\,\,\,\,\,\,\,_{0}^{{{m}_{1}}}\,\,\,\,\,\,\,\,\,\,_{-1/2}^{{{m}_{s}}}$

C) $_{3}^{N}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-3}^{l}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-2}^{{{m}_{1}}}\,\,\,\,\,\,\,\,\,\,_{-1/2}^{{{m}_{s}}}$

D) $_{2}^{N}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-2}^{l}\,\,\,\,\,\,\,\,\,\,\,\,\,_{0}^{{{m}_{1}}}\,\,\,\,\,\,\,\,\,\,_{+1/2}^{{{m}_{s}}}$

• question_answer56) Which of the following statements is incorrect?

A) cathode rays carry negative charge

B) frequency of X - rays is higher than that of microwaves

C) unit for wave number is${{m}^{-1}}$

D) threshold frequency is not the same for all metals

• question_answer57) In which of the following pairs hydrogen bonding is not possible?

A) $N{{H}_{3}},N{{H}_{3}}$

B) $N{{H}_{3}},C{{H}_{4}}$

C) ${{H}_{2}}O,C{{H}_{3}}OC{{H}_{3}}$

D) $P{{H}_{3}}$

• question_answer58) Which of the following would have the smallest bond angle$H-X-H$where X is the hetero atom?

A) $C{{H}_{4}}$

B) $N{{H}_{3}}$

C) ${{H}_{2}}O$

D) $P{{H}_{3}}$

• question_answer59) Which of the following statements is correct?

A) all diatomic molecules are polar

B) ammonia,$N{{H}_{3}}$and boron trichloride,$BC{{l}_{3}}$are both polar molecules

C) all polar diatomic molecules are composed of two different elements

D) all molecules of the type$A{{B}_{4}}$are polar

• question_answer60) Which is not true is case of an ideal gas?

A) it cannot be converted into a liquid

B) there is no interaction between the molecules

C) all molecules of the gas move with same speed

D) at a given temperature, PV is proportional to the amount of the gas

• question_answer61) Ionic product of water,${{k}_{w}},$is$1\times {{10}^{-14}}$at$290{}^\circ K$does it

A) increase at higher temperature

B) increase at lower temperature

C) remain the same at all temperatures

D) get affected by pressure as well as temperature

• question_answer62) Which of the following will form a cell with the highest voltage?

A) $1M\,A{{g}^{+}},1M\,C{{o}^{2+}}$

B) $2M\,A{{g}^{+}},2M\,C{{o}^{2+}}$

C) $0.1M\,A{{g}^{+}},2M\,C{{o}^{2+}}$

D) $2M\,A{{g}^{+}},0.1\,M\,C{{o}^{2+}}$

• question_answer63) Which of the following will form the cathode with respect to iron anode in an electrolytic cell?

A) $Mg$

B) $Al$

C) $Cu$

D) $Zn$

• question_answer64) In the following reaction, which is the species being oxidised? $2F{{e}^{3+}}(aq)+2{{I}^{-}}(aq)\to {{I}_{2}}(aq)+2F{{e}^{2+}}(aq)$

A) $F{{e}^{3+}}$

B) ${{I}^{-}}$

C) ${{I}_{2}}$

D) $F{{e}^{2+}}$

• question_answer65) Which of the following conditions will apply to the conversion of ice into water?

A) $_{-}^{\Delta H}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-}^{\Delta S}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-}^{\Delta G}\,\,\,\,\,\,\,\,\,\,_{\text{at}\,\text{low}\,\text{T}}^{{}}$

B) $_{-}^{\Delta H}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-}^{\Delta S}\,\,\,\,\,\,\,\,\,\,\,\,\,_{+}^{\Delta G}\,\,\,\,\,\,\,\,\,\,_{\text{at}\,\text{high}\,\text{T}}^{{}}$

C) $_{+}^{\Delta H}\,\,\,\,\,\,\,\,\,\,\,\,\,_{+}^{\Delta S}\,\,\,\,\,\,\,\,\,\,\,\,\,_{+}^{\Delta G}\,\,\,\,\,\,\,\,\,\,_{\text{at}\,\text{low}\,\text{T}}^{{}}$

D) $_{+}^{\Delta H}\,\,\,\,\,\,\,\,\,\,\,\,\,_{+}^{\Delta S}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-}^{\Delta G}\,\,\,\,\,\,\,\,\,\,_{\text{at}\,\text{high}\,\text{T}}^{{}}$

• question_answer66) A gas is enclosed in a room. The temperature, pressure, density and number of moles of the gas respectively are$t{}^\circ C,\text{ }p$atm,$dg\text{ }c{{m}^{-3}}$and n. If the room is partitioned into four equal compartments which of these quantities will be different in the small compartments?

A) temperature

B) pressure

C) density

D) number of moles

• question_answer67) An aqueous solution of sucrose,${{C}_{12}}{{H}_{22}}{{O}_{11}},$ containing 34.2 g/1 has an osmotic pressure of 2.38 atmospheres at$17{}^\circ C$for an aqueous solution of glucose,${{C}_{6}}{{H}_{12}}{{O}_{6}}$to be isotonic with this solution, it would have

A) 34.2 g/1

B) 17.1 g/1

C) 18.0 g/1

D) 36.0 g/1 of glucose

• question_answer68) If all the four following compounds were sold at the same price, which would be cheapest for preparing an antifreeze solution for a car radiator?

A) $C{{H}_{3}}OH$

B) ${{C}_{2}}{{H}_{5}}OH$

C) ${{C}_{2}}{{H}_{4}}{{(OH)}_{2}}$

D) ${{C}_{3}}{{H}_{5}}{{(OH)}_{3}}$

• question_answer69) It is found that 0.1 M solutions of four sodium salts$NaA,NaB,NaC$and$NaD$have the following pH values

A)  $NaD\text{ }11.0$

B)  $NaC\text{ }10.0$

C)  $NaB\text{ }9.0$

D)  $NaA\text{ }7.0$

• question_answer70) Will the dissociation of$PC{{l}_{5}}$in the reaction $PC{{l}_{5}}(g)PC{{l}_{3}}(g)+C{{l}_{2}}(g);\Delta H=+2.22$Kcal be favoured by

A) increasing temperature

B) increasing pressure

C) adding more $PC{{l}_{3}}$

D) adding more$C{{l}_{2}}$

• question_answer71) A 6 volume sample of ${{H}_{2}}{{O}_{2}}$

A) will contain 6% v/V of${{H}_{2}}{{O}_{2}}$

B) will contain 6% w/V of${{H}_{2}}{{O}_{2}}$

C) would give 6 volumes of oxygen per unit volume of${{H}_{2}}{{O}_{2}}$sample at STP

D) would give 6 volumes of oxygen per unit weight of${{H}_{2}}{{O}_{2}}$sample at STP

• question_answer72) Which of the following properties of aluminium makes it useful for food packaging?

A) Good thermal conductivity

B) Good electrical conductivity

C) Low density

D) Non-toxicity

• question_answer73) Which of the following statements is incorrect?

A) sodium is the most abundant metal in earths crust

B) sodium is the most abundant metallic element in sea water

C) melting and boiling points of alkali metals decrease down the group

D) ionic character of alkali metal halides decreases down the group.

• question_answer74) Which of the following hydrogen halides would have the highest boiling points?

A) $HF$

B) $HCl$

C) $HBr$

D) $HI$

• question_answer75) Polarisation power of a cation increases, when

A) charge of the cation increases

B) size of the cation increases

C) charge of the cation decreases

D) has no relation to its charge or size

• question_answer76) Which of the atoms having the following electronic configuration will have the highest first ionization energy?

A) $[Ne],\text{ }2{{s}^{2}},\text{ }3{{p}^{2}}$

B) $[Ne],\text{ }3{{s}^{2}},\text{ }3{{p}^{3}}$

C) $[Ne],\text{ 3}{{s}^{2}},\text{ 2}{{p}^{4}}$

D) $[He],\text{ }2{{s}^{2}},\text{ }2{{p}^{3}}$

• question_answer77) Which of the following isoelectronic species has the smallest atomic radius?

A) ${{N}^{3-}}$

B) ${{O}^{2-}}$

C) ${{F}^{-}}$

D) $Ne$

• question_answer78) Which of the following is a stable ion?

A) $R{{b}^{2+}}$

B) $B{{a}^{3+}}$

C) $S{{e}^{2-}}$

D) $S{{n}^{4+}}$

• question_answer79) Which of the following conceivable structures for$CC{{l}_{4}}$will have a zero dipole moment?

A) square planner

B) square pyramid ( carbon at apex)

C) irregular tetrahedron

D) none of the above

• question_answer80) Which of the following will not act as a buffer?

A) $NaHC{{O}_{3}}+{{H}_{2}}C{{O}_{3}}$

B) $NaOH+NaCl$

C) $C{{H}_{3}}COOH+C{{H}_{3}}COONa$

D) $N{{H}_{4}}OH+N{{H}_{4}}Cl$

• question_answer81) In which of the following resonance will be possible?

A) $C{{H}_{2}}=CH-C{{H}_{2}}-CHO$

B) $C{{H}_{2}}=CH-CHO$

C) $C{{H}_{3}}COC{{H}_{3}}$

D) $C{{H}_{2}}=CH-C{{H}_{2}}-CH=C{{H}_{2}}$

• question_answer82) Which of the following isomers will have the highest boiling points?

A) $C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}$

B) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}$

C) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}$

D) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}$

• question_answer83) Which of the following isomers will have the highest octane number?

A) $C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}$

B) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}$

C) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}$

D) $C{{H}_{3}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{3}}$

• question_answer84) Which of the following is an example of electrophilic addition?

A)

B) $C{{H}_{3}}-CH=C{{H}_{2}}+HBr\to C{{H}_{3}}CHBrC{{H}_{3}}$

C) $C{{H}_{3}}-CH=CH-C{{H}_{3}}+HBr\xrightarrow[{}]{peroxide}$$C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}Br$

D) $C{{H}_{3}}CH=C{{H}_{2}}+{{H}_{2}}\xrightarrow[{}]{catalysts}$$C{{H}_{3}}C{{H}_{2}}-C{{H}_{3}}$

• question_answer85) Which of the following compounds is isomeric with 2,2, 4,4 - tetramethylhexane?

A) 3-Ethyl-2, 2-dimethylpentane

B) 4-Isopropyl heptane

C) 4-Ethyl-3 methyl-4-w-propyloctane

D) 4, 4-Diethyl-3-methyIheptane

• question_answer86) The number of possible isomeric compounds for molecular formula ${{C}_{5}}{{H}_{10}}$would be

A) 8

B) 7

C) 6

D) 5

• question_answer87) Electronic configuration of four neutral atoms is given below. Which of the corresponding element would be diamagnetic?

A) $1{{s}^{2}},\text{ }2{{s}^{2}},\text{ }2{{p}^{6}}$

B) $1{{s}^{2}},\text{ 2}{{s}^{2}},\text{ }2{{p}^{1}}$

C) $1{{s}^{2}},\text{ }2{{s}^{2}},\text{ }2{{p}^{5}}$

D) $1{{s}^{2}},\text{ }2{{s}^{2}},\text{ }2{{p}^{4}}$

• question_answer88) The first $(I{{E}_{1}})$and second$(I{{E}_{2}})$ionization energies$\text{(kj/mol)}$of a few elements designated by Roman numerals are given below. Which of these would be an alkali metal?

A) $_{\text{I}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{\text{2372}}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{\text{5251}}^{\text{I}{{\text{E}}_{\text{2}}}}$

B) $_{\text{II}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{520}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{7300}^{\text{I}{{\text{E}}_{\text{2}}}}$

C) $_{\text{III}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{900}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{1760}^{\text{I}{{\text{E}}_{\text{2}}}}$

D) $_{\text{IV}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{1680}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{3380}^{\text{I}{{\text{E}}_{\text{2}}}}$

• question_answer89) Oxidation state of the metal ion in the complex ${{[Fe{{(CN)}_{3}}]}^{3-}}$is

A) +3

B) $-3$

C) +6

D) $-6$

• question_answer90) Which of the following is the strongest acid?

A) $HOCl$

B) $HOCl{{O}_{2}}$

C) $HOCl{{O}_{3}}$

D) $HOClO$

• question_answer91) In the following sequence of reactions, the compound C formed would be $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ N{{H}_{2}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\xrightarrow[{}]{HN{{O}_{2}}}A\xrightarrow[{}]{OX}B$ $\xrightarrow[{{H}^{+}}/{{H}_{2}}O]{C{{H}_{3}}MgI}C$

A) butanol - 1

B) butanol - 2

C) 2 - methylpropanol - 2

D) 1,1 - Dimethylethanol

• question_answer92) Which of the following applies in this reaction? $C{{H}_{3}}-CHBr-C{{H}_{2}}-C{{H}_{3}}\xrightarrow[{}]{alc\,KOH}$ (i) $C{{H}_{3}}-CH=CH-C{{H}_{3}}$major product (ii) $C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{3}}$minor product

A) Markownikoff rule

B) Saytzeffs rule

C) Kharasch effect

D) Hofmanns rule

• question_answer93) Which of the following isomeric alcohols react fastest with$HCl$?

A) butanol - 1

B) 2 - methyl propanol -1

C) 2,2 - dimethyl ethanol

D) butanol - 2

• question_answer94) Which of the following statements is incorrect?

A) enzymes are organic catalysts

B) enzymes have a very large turnover number

C) enzyme action is specific

D) enzymes always require a coenzyme for their catalytic action?

• question_answer95) Which of the following hormones regulates sugar metabolism in the body?

B) insulin

C) thyroxine

D) estrone

• question_answer96) Deficiency of which of the following vitamin adversely affects eyesight?

A) A

B) D

C) ${{B}_{2}}$

D) E

• question_answer97) Under which of the following conditions would toluene,${{C}_{6}}{{H}_{5}}-C{{H}_{3}}$be converted into bromomethyl benzene${{C}_{6}}{{H}_{5}}-C{{H}_{2}}Br$?

A) reaction with $B{{r}_{2}}/FeB{{r}_{3}}$

B) reaction with$B{{r}_{2}}$in sunlight

C) reaction with$B{{r}_{2}}$in dark

D) reaction with$HBr$

• question_answer98) Which of the following will have the fastest rate of reaction with$B{{r}_{2}}/FeB{{r}_{3}}$?

A)

B)

C)

D)

• question_answer99) If one strand of DNA has the sequence ATGCTTGA, the sequence in the complementary stand would be

A) TACGAACT

B) TCCGAACT

C) TACGTACT

D) TACGTAGT

• question_answer100) Which of the following will give iodoform reaction?

A) $C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}-C{{H}_{2}}OH$

B) $C{{H}_{3}}CHOH.C{{H}_{3}}$

C) $C{{H}_{3}}C{{H}_{2}}COH$

D) $C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}$

• question_answer101) In oocyte secondary maturation occurs in

A) ovary

B) abdominal cavity

C) fallopian tube

D) uterus.

• question_answer102) Repair of endometrium is undertaken by

A) LH

B) FSH

C) estrogen

D) prolactin.

A) increases blood$Ca$level

B) decreases bone$Ca$level

C) decreases blood$Ca$level

D) increases blood$Ca$level and decreases bone$Ca$level.

• question_answer104) Conn disease is caused by hypersecretion of

A) parathyroid

C) thyroid

D) pituitary.

• question_answer105) Name the hormone associated with the metabolism of phosphorus and calcium?

A) glucocorticoids

B) mineralocorticoids

C) calcitonin

D) glucagon.

• question_answer106) Deficiency of thyroid hormone causes

A) exophthalmic goitre

B) acromegaly

C) myxoedema

D) hyperglycemia.

A) ammonotelic

B) ureotelic

C) uricotelic

D) none of these.

A) mesonephric

B) metanephric

C) pronephric

D) both [a] and [b]

• question_answer109) During winter a person died during sleep, the room was closed and a container with burnt charcoal was found in the room. What may be the possible reason of his death?

A) non-availability of oxygen

B) Hb has more affinity to combine with carbon monoxide

C) Hb has more affinity to combine with nitrogen

D) combined effect of [a] and [b].

• question_answer110) Which cell cannot divide following birth in humans?

A) muscle cells

B) erythroblasts

C) osteoblasts

D) neuron.

• question_answer111) In the above question letter Y and M denote

A) rennin and$C{{a}^{++}}$respectively

B) $C{{a}^{++}}$and rennin respectively

C) rennin,$HCl$and$C{{a}^{++}}$respectively

D) renin and$C{{a}^{++}}$respectively.

• question_answer112) Normally regeneration occurs in

A) fish

B) snakes

C) Planarian

D) birds.

• question_answer113) Salivation in mammals is under the control of

A) medulla oblongata

B) mesencephalon

C) hypothalamus

D) cerebellum.

• question_answer114) Hypophysial portal system is found in

A) kidney

B) liver

C) brain

D) heart.

• question_answer115) Nerve fibres transmit the nerve message by means of

A) chemical

B) physical

C) electro-chemical

D) electrical.

• question_answer116) The process by which most of the cartilaginous tissue is transformed into bones is

A) endochondrial ossification

B) intermembranous ossification

C) calcification

D) none of the above.

• question_answer117) Megakaryocytes give rise to

A) erythrocytes

B) granulocytes

C) agranulocytes

D) thrombocytes.

• question_answer118) Microfilaments have a diameter of

A) less than 2 hn

B) 4-5 nm

C) 4 - 6 nm

D) 10 nm.

• question_answer119) Liver in the body stores

A) vit D

B) vit E

C) vit K

D) all of these.

• question_answer120) Sex chromosome remains in

A) testes

B) ovary

C) kidney and liver

D) all of these.

• question_answer121) Digestion in Hydra is

A) intracellular

B) extracellular

C) both [a] and [b]

D) none of these.

• question_answer122) The example of oviparous mammal is

A) Talpa

B) Erinaceous

C) Macropus

D) Echidna.

A) category

B) taxon

C) both [a] and [b ]

D) none of these.

• question_answer124) The barr body is observed in

A) 3%malebasophils

B) 3% female basophils

C) 3% male heutrophils

D) 3% female neutrophils.

• question_answer125) During the mitosis of human He-La cells the longest-period is

A) gap - 1 - phase

B) S - phase

C) gap - 2 - phase

D) M - phase.

• question_answer126) Which of the following factor is known as Christmas factor?

A) factor VIII

B) factor XII

C) factor IV

D) factor IX.

• question_answer127) Which is most important in speciation?

A) geographical isolation

B) reproductive isolation

C) ecological isolation

D) ethological isolation.

• question_answer128) The type of fossil where hard parts like bone or trunks of trees are preserved are known as

A) petrifaction

B) moulds

C) compression

D) pseudofossil.

• question_answer129) The devonian period is considered to be as

A) age of fishes

B) age of amphibians

C) age of reptiles

D) age of mammals.

• question_answer130) Which one of the following are homologous organs?

A) wings of butterfly, flying fish and bird

B) tails of scorpion, bird and monkey

C) stings of bee, scorpion and fangs of snake

D) paddles of whale, arms of man, wings of bat.

• question_answer131) Pleiotropy is the term that refers to the situation in which a gene influences more than one trait. Its example is given by

A) sickle cell anaemia

B) haemophilia

C) colourblindness

D) only [a] and [b].

• question_answer132) If two persons with heterozygous A and B blood group marries, then possibility of genotypes in their progeny are

A) only ii

B) only W

C) ${{I}^{A}}i$and ${{I}^{B}}i$

D) all of these.

• question_answer133) Restriction enzymes may be used for

A) making reccmbinant DNA

B) gene mapping

C) diagnosis of genetic diseases

D) all of the above.

• question_answer134) Which of the following is incorrect?

A) noise pollution does not leave any residue in the environment

B) noise pollution creates nervous disorders

C) plants are efficient absorbers of noise of low frequency

D) loss of hearing is a common disorder.

• question_answer135) Polyploidy can result from

A) double fertilization

B) polyspermy

C) diploid gametes

D) all of these.

• question_answer136) Nicotinic acid occurs in

A) fresh tobacco leaves

B) fresh meat and eggs

C) fresh carrot and peaches

D) cereals and citrus fruits.

• question_answer137) An antiviral substance known to prevent the synthesis of new virus in the cell is known as

A) transferon

B) antibody

C) inferon

D) interferon.

• question_answer138) Bacterial-pathogens such as Escherichia coli, Campylobacter and Salmonella are responsible for diseases like

A) diarrhoea

B) whooping cough

C) cholera

D) diphtheria.

• question_answer139) The all familiar disease amoebiasis is caused by

A) Wuchereria bancrofti

B) Ascaris lumbricoides

C) Taenia solium

D) Entamoeba histolytica.

• question_answer140) Right systemic arch is absent in

A) reptiles

B) birds

C) mammals

D) none of these.

• question_answer141) Which is non-invasive technique of genetic counselling?

A) amniocentesis

B) chorionic biopsy

C) foetal blood sampling

D) ultrasonography.

• question_answer142) Ratio of natality and mortality of a population expressed in percentage is

A) vital index

B) growth rate

C) survival rate

D) biotic potential.

• question_answer143) Asbestos is an established mutagen. The target tissue of this is

A) liver

B) skin

D) lungs.

• question_answer144) The genotype of$R{{h}^{+}}$person could be

A) $rr$

B) $RR$

C) $Rr$

D) both [b] and [c].

• question_answer145) Mental retardation is not related with

A) trisomy 21

B) phenylalanine hydroxylase

C) myelinization of neuron

D) Y chromosome.

• question_answer146) Which pair is incorrect?

A) haemophilia - X linked recessive

B) baldness - X linked dominance

C) colour blindness - X linked recessive

D) antler in deer- sex limited.

• question_answer147) Which group of following could be called immune disorder?

A) SCID and diphtheria

B) AIDS and cholera

C) SCID and AIDS

D) hepatitis and leukemia.

• question_answer148) There are at least three methods of transmission available for AIDS i.e. sexual, perinatal and parenteral. Mother to child infection is called as

A) parenteral

B) perinatal

C) both [a] and [b]

D) none of these.

• question_answer149) Recombination of the alleles of two genes A and B following crossing over will hypothetically result in four allelic recombinations. In the absence of crossing over the two parental combinations would be formed as

A) AB and ab type

B) AB and Ab type

C) ab and aB type

D) AB, ab, Ab and aB.

• question_answer150) Which of the following statements is not correct for sickle cell anaemia?

A) sixth amino acid (from NH^ terminus) of beta chain is glutamic acid

B) erythrocytes elongates and form sickle shaped cells

C) individual homozygous for haemoglobin S allele are$Hb_{B}^{S}/Hb_{B}^{S}$

D) beta chain of haemoglobin S contains valine

• question_answer151) In eukaryotic cells, the amount of basic proteins is often found to be

A) more than the amount of DNA

B) less than the amount of DNA

C) equal to the amount of DNA

D) none of the above.

• question_answer152) The chemical structure of chlorophyll a varies from chlorophyll b5 due to difference between

A) $C{{H}_{3}}$and ${{C}_{2}}{{H}_{5}}$

B) $C{{H}_{3}}$and$HCH=C{{H}_{2}}$

C) $C{{H}_{3}}$and$CHO$

D) $CHO$and$CH=C{{H}_{2}}$

• question_answer153) $C{{O}_{2}}$compensation point will be

A) higher in${{C}_{3}}$plants

B) higher in${{C}_{4}}$plants

C) equal in${{C}_{3}}$and${{C}_{4}}$plants

D) zero for both type of plants.

• question_answer154) In order to reduce expenses over plantation for afforestation under the umbrella of social forestry, a system has been developed which includes forestry and agriculture. The system is termed as

A) block system

B) selective harvest system

C) taungya system

D) none of the above.

• question_answer155) Reindeer Moss, a very important producer in arctic zone and which constitute the starting point. of food chain in this region and also the staple food of reindeers belongs to

A) pteridophyta

B) green algae

C) lichens

D) none of these.

• question_answer156) In photorespiration cell organelles involved are

A) chloroplast, mitochondria and peroxisome

B) chloroplast, mitochondria and glyoxysome

C) chloroplast and mitochondria

D) chloroplast and golgi bodies.

• question_answer157) Which one of the following occur in radioactive fallout and behaves like calcium in biogeochemical cycling?

A) cobalt-60

B) cesium-137

C) strontium-90

D) none of these.

• question_answer158) In electron transport chain,$FAD{{H}_{2}}$is oxidised to FAD, the electrons are passed to cytochrome proteins whereas hydrogen ions are released into

A) matrix

B) outer membrane

C) cytosol

D) primitochondrial space.

• question_answer159) In our biosphere, the most important and vast area is covered by hydrosphere. The hydrosphere has

A) 1.4 billion cubic km of water

B) 1.4 million cubic km. of water

C) 2.5 billion cubic km. of water

D) 1.5 million cubic km. of water.

• question_answer160) Hill reaction was demonstrated

A) in the absence of water

B) in the absence of carbon dioxide

C) in the presence of carbon dioxide

D) in the absence of a suitable electron acceptor.

• question_answer161) Minamata is a common disease which is prevalent in certain industrial areas of developed countries. The main cause of the disease is due to the pollution of heavy metals. Select the metals responsible for this disease

C) mercury

D) magnesium.

• question_answer162) In a cell cycle the RNA synthesis, needed in protein synthesis, occurs in

A) synthetic period

B) post-mitotic gap period

C) pre-mitotic gap period

D) prophase.

• question_answer163) Storage of enzymes for the digestion of cellular components, proteins and carbohydrates is carried out by

A) mitochondria

B) lysosomes

C) centriole

D) ribosomes.

• question_answer164) In E. coli cell, according to operon theory, an operator gene combines with

A) inducer gene to switch on structural gene transcription

B) represser protein to switch off structural gene transcription

C) regulator gene to switch on structural gene transcription

D) represser protein to switch on structural gene transcription.

• question_answer165) A pleiotropic gene is one which

A) affects one character

B) affects more than one characters

C) affects more than ten characters

D) does not affect any character.

• question_answer166) If a sporangium develops from a single cell, the development of sporangium is known as

A) heterosporangiate

B) homosporangiate

C) eusporangiate

D) leptosporangiate.

• question_answer167) The ovule during its development undergoes $90{}^\circ$curvature bringing the micropyle and chalaza in a line but a right angle to the funicle. The ovule development conforms to

A) anatropous

B) atropus

C) campylotropous

D) hemianatropous.

• question_answer168) Turpentine oil which is one of the most important forest product and is the base of varnish and paint industry is obtained from

A) Cedrus

B) Pinus

C) Abies

D) bye-product of petroleum.

• question_answer169) Chlorophylls and heme are closely related, however, differ because

A) heme has iron and no phytol tail

B) heme has iron and a phytol tail

C) heme has magnesium and no phytol tail

D) heme has magnesium and a phytol tail.

• question_answer170) Photorespiration could easily be detected in

A) ${{C}_{3}}$plants

B) ${{C}_{4}}$plants

C) both in${{C}_{5}}$and${{C}_{4}}$

D) none of these.

• question_answer171) How many meiotic divisions would be required to produce 101 female gametophytes in an angiosperm?

A) 26

B) 101

C) 127

D) none of these.

• question_answer172) Elongation of internodes in grasses mainly occurs due to

A) apical meristems

B) vascular cambium

C) procambium

D) intercalary meristem.

• question_answer173) Tapetal cells are characterized by the presence of

A) dense cytoplasm and one nucleus

B) thin cytoplasm and many nuclei

C) dense cytoplasm and prominent nuclei

D) none of the above.

• question_answer174) Late blight of potato is caused by

A) Alternaria solani

B) Phytophthora infestans

C) Phytophthora solani

D) Albugo Candida.

• question_answer175) A typical foliage leaf comprises

A) hypopodium

B) mesopodium

C) epipodium

D) all of these.

• question_answer176) Intergeneric crosses are rarely successful. Which of the following may be used to achieve success in this regard?

A) tissue culture

B) somatic hybridization

C) protoplast fusion

D) all of the above.

• question_answer177) For normal photosynthetic process in red algae, the pigments are

A) phycocyanin and chlorophyll a

B) phycocyanin and chlorophyll b

C) phycoerythrin and chlorophyll a

D) phycoerythrin and chlorophyll b.

• question_answer178) The algae which occurs as parasite on the tea plants is

A) Acetobtdaria

B) Cazilerpa

C) Harvcyella on red algae

D) Cephaleuros red rust of tea.

• question_answer179) The mycorrhizal fungi help its host by

A) improving nutrient uptake

B) giving mechanical support

C) stimulating vegetative growth

D) none of the above.

• question_answer180) Okazaki fragments are produced during the synthesis of

A) m-RNA

B) protein

C) t-RNA

D) DNA.

• question_answer181) All tailed bacteriophages contain

A) double stranded DNA

B) double stranded RNA

C) single stranded DNA

D) single stranded RNA.

• question_answer182) The plants produced through anther culture may be

A) haploid

B) diploid

C) polyploid

D) all of these.

• question_answer183) Which one of the following plants exhibits an example of anisophylly, where the different size of leaves are present in opposite phyllotaxy?

A) Ranunculus aquatalis

B) goldfussia

C) Limnophila heterophyllum

D) Vallisneria spirilis.

• question_answer184) Chipko Andolan (movement) which was started in 1970 in GarhwaI/Himalayas (Gopeshwar) near Alaknanda River was for the first time initiated by

B) Sunder Lal Bahuguna

C) Baba Amte

D) Vinoba Bhave.

• question_answer185) Apomixis is the production of a new plant through

A) vegetative propagation

B) apogamy

C) diplospory

D) all of these.

• question_answer186) The cell ca of 2-celled proembryo divides transversely, whereas the cell cb does not divide at all. Even if the suspensor is formed that too develops from the cell ca. The embryo develops from the cell ca or its derivatives. The embryo development conforms to

A) cytokinesis may take place

B) cytokinesis may not take place

C) cytokinesis may and may not take place

D) all of the above.

• question_answer188) If the decomposers stop functioning in an ecosystem, from functioning of ecosystem will be affected due to

A) energy flow in the ecosystem will be blocked

B) cycling of mineral and material will be stopped

C) both [a] and [b]

D) nothing will happen on the functioning of ecosystem.

• question_answer189) Myrmecophily is a beneficial association between some flowering plants and

A) mycoplasm

B) bacteria

C) ants

D) bacteria and virus.

• question_answer190) A distinct nucleus is generally present in each and every plant cell at meristematic stage. During differentiation the nucleus disorganises in which of the following?

A) phloem parenchyma

B) companion cells

C) vessels

D) none of these.

• question_answer191) If a fruit is developed from bicarpellary, syncarpous, superior ovary with parietal placentation and unilocular when young but becoming bilocular with age and also pod like in appearance is termed as

A) lomentum

B) silicula

C) siliqua

D) cypsella.

• question_answer192) The male cone of Pinus is composed of microsporophylls. Each microsporophyll has

A) one microsporangium on abaxial side

B) two microsporangia on adaxial side

C) two microsporangia on abaxial side

D) one microsporangium on adaxial side.

• question_answer193) Lencaena - a fast growing tree has been selected as a fuel yielding tree under the social forestry programme in rural area of our country. What is the common name of this tree?

A) babul

B) subabul

C) jojoba or Ho-hoba

D) none of these.

• question_answer194) One of the recently introduced new crop of oil seed in the deserts of India is Jojoba. Select the correct botanical name of this plant.

A) Simmondsia chinensis

B) Lencaena leucophlala

C) Dendroclamus

D) Dendrobium javanica.

• question_answer195) Which one of the following is M.F.R?

A) timber

B) lumber

C) pectin

D) plywood.

• question_answer196) The pyramid ofbiomass would be inverted in

A) grassland ecosystem

B) forest ecosystem

C) fresh water ecosystem

D) none of the above.

• question_answer197) Agar-Agar which is commonly used in microbiological studies and culture media is obtained from

A) Gelidium

B) Laminaria

C) Laminaria and Polysiphonia

D) Batrachospernum.

• question_answer198) Which one of the following plant is commonly used as green manure?

A) Crotalaria juncea

B) Dalbergia

C) Cassia

D) Acacia.

• question_answer199) A natural phenomenon is commonly observed in lakes, ponds and ditches that there is a rich growth of algae and other microorganisms which consume much of the dissolved oxygen resulting the death of fish at night. This phenomenon is termed as

A) litterization

B) transmigration

C) eutrophication

D) esturaization.

• question_answer200) A coordinated unit which controls the genetic expression is known as

A) cistron

B) recon

C) operon

D) muton.