NEET Biology Transport In Plants Question Bank

done Self Evaluation Test - Transport in Plants Total Questions - 91

• question_answer1)
  Which of the following is used to determine the rate of transpiration in plants?
  A)
  Porometer/hygrometer done clear
  B)
  Potometer done clear
  C)
  Auxanometer done clear
  D)
  Tensiometer/Barometer done clear
  View Solution play_arrow

• question_answer2)
  Which is produced during water stress that brings stomatal closure?     
  A)
  Ethylene            done clear
  B)
         Abscisic acid done clear
  C)
  Ferulic acid    done clear
  D)
         Coumarin done clear
  View Solution play_arrow

• question_answer3)
  Water absorption by root hairs occurs until:
  A)
  Concentration of water in the cell sap is higher. done clear
  B)
  Salt concentration in soil is higher. done clear
  C)
  They are separated from soil by a selectively permeable membrane. done clear
  D)
  Water potential is lower. done clear
  View Solution play_arrow

• question_answer4)
  A bottle filled with previously moistened mustard seeds and water was screw capped tightly and kept in a comer. It blew up suddenly after about half an hour. The phenomenon involved is:
  A)
  Diffusion            done clear
  B)
         Imbibition done clear
  C)
  Osmosis             done clear
  D)
         D.P.D. done clear
  View Solution play_arrow

• question_answer5)
  What point can be cited for 10% sodium chloride solution and 10% sugar solution present?
  A)
  Both have equal OP         done clear
  B)
  The concentration of sodium chloride solution will be less than concentration of sugar solution. done clear
  C)
  The OP of sugar solution will be higher than OP of sodium chloride solution. done clear
  D)
  DPD of sodium chloride solution will be higher than DPD of sugar solution. done clear
  View Solution play_arrow

• question_answer6)
  A plant cell placed in pure water will:
  A)
  Expand until the osmotic potential or solute potential reaches that of water. done clear
  B)
  Becomes more turgid until the pressure potential of cell reaches its osmotic potential. done clear
  C)
  Become more turgid until the osmotic potential reaches that of pure water. done clear
  D)
  Becomes less turgid until the osmotic potential reaches that of pure water. done clear
  View Solution play_arrow

• question_answer7)
  Water potential of actively absorbing cells is:
  A)
  Always +ve       done clear
  B)
  Always -ve done clear
  C)
  Always 0           done clear
  D)
  Always >1 done clear
  View Solution play_arrow

• question_answer8)
  Analyse the figure and choose the correct statement regarding this.
  A)
  Kinetic energy (K.E.) of \[{{H}_{2}}O\] in A solution > K.E. of water in B solution. done clear
  B)
  K.E. of water in B solution > K.E. of water in A solution. done clear
  C)
  K.E. of water in A solution = K.E. of \[{{H}_{2}}O\] in B solution. done clear
  D)
  Water potential has nothing to do with K.E. of water in a solution. done clear
  View Solution play_arrow

• question_answer9)
  Refer the experiment given below: After a few days, which of the following will have occurred?
  A)
  A rise in level X and a drop in level Y. done clear
  B)
  A drop in level X and a drop in level Y. done clear
  C)
  A rise in level X and a rise in level Y. done clear
  D)
  A drop in level X and a rise in level Y. done clear
  View Solution play_arrow

• question_answer10)
  Stomata of a plant open due to:
  A)
  Influx of calcium ions done clear
  B)
  Influx of potassium ions done clear
  C)
  Efflux of potassium ions done clear
  D)
  Influx of hydrogen ions done clear
  View Solution play_arrow

• question_answer11)
  Potometer works on the principle of:
  A)
  Osmotic pressure. done clear
  B)
  Amount of water absorbed equals the amount transpired. done clear
  C)
  Root pressure done clear
  D)
  Potential difference between the tip of the tube and that of the plant. done clear
  View Solution play_arrow

• question_answer12)
  The metal ion involved in the stomatal regulation is:
  A)
  Iron                   done clear
  B)
         Magnesium done clear
  C)
  Zinc                  done clear
  D)
         Potassium done clear
  View Solution play_arrow

• question_answer13)
  Movement of \[{{H}_{2}}O\]  through cell wall is called:
  A)
  Apoplast            done clear
  B)
         Symplast done clear
  C)
  Tonoplast          done clear
  D)
         None of these done clear
  View Solution play_arrow

• question_answer14)
  Passive absorption of water by the root system, is the result of:
  A)
  Forces created in the cells of the root done clear
  B)
  Increased respiratory activity in root cells done clear
  C)
  Tension on the cell sap due to transpiration done clear
  D)
  Osmotic force in the shoot system done clear
  View Solution play_arrow

• question_answer15)
  Study the following statement and choose the correct option(s) from the codes given below.

  (i) Root pressure provides a light push in the overall process of water transport.

  (ii) Root pressure causes the flow of water faster through xylem than it can be lost by transportation.

  (iii) In symplast pathway, water move exclusively through the cell wall and intercellular spaces.

  (iv) Guttation is a cause of transpiration pull.

  (v) Most plants fulfill their water requirement by transpiration pull.

  A)
  (i), (ii) and (iii) are correct while iv and v are incorrect. done clear
  B)
  (iv) and (v) are correct while i, ii and iii are incorrect. done clear
  C)
  (i) and (v) are correct done clear
  D)
  (ii) and (iii) are correct while i, iv and v are incorrect. done clear
  View Solution play_arrow

• question_answer16)
  Which of the following statements is/are incorrect?

  (i) In CAM plants, stomata open during dark and remain closed during the day.

  (ii) Role of \[N{{a}^{+}}\] in stomatal opening is now universally accepted.

  (iii) The water potential of root cells is higher than the water potential of soil.

  (iv) Capillarity theory is the most accepted theory of water movement through plants.

  (v) The walls of xylem vessels made up of lignocellulose have strong affinity for water molecules.

  A)
  (ii), (iii) and (v) only done clear
  B)
  (ii), (iii) and (iv) only done clear
  C)
  (i), (ii) and (iii) only done clear
  D)
  (ii) and (iii) only done clear
  View Solution play_arrow

• question_answer17)
  Water will move from the root hairs through cortex if the water potentials are:
  A)
  Root hairs = 0; Cortex = 0; Xylem = 0 done clear
  B)
  Root hairs = 0; Cortex = - 1; Xylem = -2 done clear
  C)
  Root hairs = -2; Cortex = -1; Xylem = 0 done clear
  D)
  Root hairs = 0; Cortex = + 1; Xylem = + 2 done clear
  View Solution play_arrow

• question_answer18)
  Which of the atmospheric factor act as anti-transpirant?                 
  A)
  \[S{{O}_{2}}\]              done clear
  B)
         CO done clear
  C)
  \[C{{O}_{2}}\]             done clear
  D)
         All pollutant gases done clear
  View Solution play_arrow

• question_answer19)
  Adhesion is caused by:
  A)
  Formation of hydrogen bond between water molecules. done clear
  B)
  Transpiration pull. done clear
  C)
  Higher surface tension. done clear
  D)
  Attraction of water molecule to polar surface. done clear
  View Solution play_arrow

• question_answer20)
  When stomata open, the pH of guard cells:
  A)
  Increases            done clear
  B)
         Decreases done clear
  C)
  Remains same done clear
  D)
         Both [a] and [b] done clear
  View Solution play_arrow

• question_answer21)
  Influx of \[{{K}^{+}}\] ions of subsidiary cells into guard cells and efflux of \[{{H}^{+}}\] ions from guard cells lead to:
  A)
  Closing of stomata          done clear
  B)
  Opening of stomata done clear
  C)
  Exosmosis          done clear
  D)
  Plasmolysis done clear
  View Solution play_arrow

• question_answer22)
  Which of the following will be zero when the cell becomes fully turgid?
  A)
  Turgor pressure done clear
  B)
         Wall pressure done clear
  C)
  Suction pressure done clear
  D)
         Osmotic pressure done clear
  View Solution play_arrow

• question_answer23)
  If the pressure potential is +0.16 megapascals (MPa) and the osmotic potential is -0.24 megapascals, then the water potential would be:
  A)
  +0.4 MPa         done clear
  B)
         +0.08 MPa done clear
  C)
  -0.08 MPa         done clear
  D)
         +0.16 MPa done clear
  View Solution play_arrow

• question_answer24)
  Water is lost in liquid state in some plants through hydathodes. These hydathodes:
  A)
  Always remain open. done clear
  B)
  Do not show any specificity in opening and closing. done clear
  C)
  Remain closed at night. done clear
  D)
  Remain closed during day. done clear
  View Solution play_arrow

• question_answer25)
  Lenticels and hydathodes are small pores with one of the following common attribute:
  A)
  They allow exchange of gases. done clear
  B)
  Their opening and closing is not regulated. done clear
  C)
  They always remain closed. done clear
  D)
  They are found on the same part of plants. done clear
  View Solution play_arrow

• question_answer26)
  When stomata close, which of the following events does not occur?      
  A)
  Guard cells become flaccid. done clear
  B)
  Sugar is converted to starch. done clear
  C)
  O.P. of the guard cells decreases. done clear
  D)
  Accumulation of \[{{O}_{2}}\] takes place. done clear
  View Solution play_arrow

• question_answer27)
  Based on Munch's pressure-flow hypothesis, which of the following conditions would increase the rate of translocation?
  A)
  An increase in the humidity in the outside air. done clear
  B)
  A decrease in phloem unloading at the sink. done clear
  C)
  An increase in sucrose production at the source. done clear
  D)
  A decrease in photosynthesis. done clear
  View Solution play_arrow

• question_answer28)
  Match the following columns

  	Column-I		Column-II
  A.	Semipermeable membrane	I.	Dixon and Jolly
  B.	Transpiration Pull	II.	Manometer
  C.	Pulsation theory	III.	Holard
  D.	Root pressure	IV.	J. C. Bose
  E.	Whole wate content in so	V.	Osmosis
  F.	Cohesion and Adhesion the

  A)
  A-II;    B-I;     C- IV;    D-V;     E-III;    F-I done clear
  B)
  A-V;    B-I;     C-IV;     D-II;     E-III;    F-I done clear
  C)
  A-V;   B-IV;    C- I;      D- II;    E-III;    F-I done clear
  D)
  A-I;    B-I;      C- II;     D-IV;    E-III;    F-V     done clear
  View Solution play_arrow

• question_answer29)
  What happens when concentration of solutes decreases in guard cells? 
  A)
  Water potential decreases done clear
  B)
  Water potential increases done clear
  C)
  Osmotic pressure increases done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer30)
  Munch hypothesis is based on:
  A)
  Translocation of food due to turgor pressure (TP) gradient. done clear
  B)
  Translocation of food due to imbibition force. done clear
  C)
  Translocation of food due to TP gradient and imbibition force. done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer31)
  The translocation sugars in angiosperms occurs in the form of:
  A)
  Glucose             done clear
  B)
         Sucrose done clear
  C)
  Fructose             done clear
  D)
         Lactose done clear
  View Solution play_arrow

• question_answer32)
  Transport of different types of solute substances takes place by:
  A)
  Bulk flow system done clear
  B)
  Combined response done clear
  C)
  Facilitated diffusion         done clear
  D)
  Pressured transport done clear
  View Solution play_arrow

• question_answer33)
  Excessive loss of water causes wilting of leaves, it can be prevented by:       
  A)
  Keeping the plant in bright light. done clear
  B)
  Spraying the plant with alcohol. done clear
  C)
  Applying vaseline on the leaf surface. done clear
  D)
  Adding high amounts of fertilisers to the soil. done clear
  View Solution play_arrow

• question_answer34)
  The spray of Phenyl Mercuric Acetate (PMA) causes:                    
  A)
  Decrease in transpiration   done clear
  B)
  Increase in transpiration done clear
  C)
  Increase in absorption done clear
  D)
  Increase in guttation done clear
  View Solution play_arrow

• question_answer35)
  Mesophyll tissue of leaf is at water potential of -10.0 bars while epidermal cells of leaf have water potential of-8.0 bars and the air outside has water potential of -5.0 bars. Water will move from:                
  A)
  Air \[\to \] epidermis \[\to \] mesophyll done clear
  B)
  Mesophyll \[\to \] air \[\to \] epidermis done clear
  C)
  Mesophyll \[\to \] epidermis \[\to \] air done clear
  D)
  Water will not move. done clear
  View Solution play_arrow

• question_answer36)
  The lowest water potential is found in:
  A)
  Leaves  done clear
  B)
         Xylem done clear
  C)
  Root hair           done clear
  D)
         Phloem done clear
  View Solution play_arrow

• question_answer37)
  Water in the adjacent xylem moves into the phloem by the process of:
  A)
  Facilitated diffusion         done clear
  B)
  Acute transport done clear
  C)
  Simple diffusion done clear
  D)
         Osmosis done clear
  View Solution play_arrow

• question_answer38)
  The graph shows the relationship between \[{{\psi }_{w}}\] (water potential), \[{{\psi }_{s}}\] (solute potential) and \[{{\psi }_{p}}\] (pressure potential) for a plant cell placed in pure water.              What are the correct labels for the graph?
  A)

  P	Q	R
  \[{{\psi }_{W}}\]	\[{{\psi }_{p}}\]	\[{{\psi }_{s}}\]

    done clear
  B)

  \[{{\psi }_{W}}\]

  \[{{\psi }_{s}}\]

  \[{{\psi }_{p}}\]

    done clear
  C)

  \[{{\psi }_{p}}\]

  \[{{\psi }_{W}}\]

  \[{{\psi }_{s}}\]

  done clear
  D)

  \[{{\psi }_{p}}\]

  \[{{\psi }_{s}}\]

  \[{{\psi }_{W}}\]

    done clear
  View Solution play_arrow

• question_answer39)
  Which one of the following graphs most closely represents the relationship between the rate of transpiration of a mesophytic leaf and the atmospheric humidity?
  A)
         done clear
  B)
    done clear
  C)
        done clear
  D)
  done clear
  View Solution play_arrow

• question_answer40)
  Which of the following theories of ascent of sap was proposed by an eminent Indian scientist J.C. Bose?
  A)
  Pulsation theory done clear
  B)
  Relay pump theory done clear
  C)
  Transpiration pull theory done clear
  D)
  Root pressure theory done clear
  View Solution play_arrow

• question_answer41)
  Oozing out of water drops from injured edges or tips is called:
  A)
  Oozation            done clear
  B)
         Bleeding done clear
  C)
  Guttation       done clear
  D)
         Transpiration done clear
  View Solution play_arrow

• question_answer42)
  In soil, the water available for root absorption is:
  A)
  Gravitational water         done clear
  B)
  Capillary water done clear
  C)
  Hygroscopic water           done clear
  D)
  Combined water done clear
  View Solution play_arrow

• question_answer43)
  Active absorption of water by roots from the soil is mainly affected by:
  A)
  Tension in cell sap due to transpiration done clear
  B)
  Osmotic concentration of cell sap done clear
  C)
  Hydrophobic nature of root hair done clear
  D)
  Typical tissue organisation done clear
  View Solution play_arrow

• question_answer44)
  Read the following statement and choose the correct one from the codes given below.

  (i) The apoplastic movement of water takes place exclusively through intercellular spaces and cell wall without crossing any membrane.

  (ii) Symplastic movement occurs from cell to cell through plasmodesmata, i.e., adjacent cells are connected through plasmodesmata.

  (iii) Permeability of a membrane depends on its composition and chemical nature of the solute.

  (iv) Solutes present in a cell increase the free energy of the water or water potential.

  A)
  (i),(ii) and (iii) done clear
  B)
         (i), (ii) and (iv) done clear
  C)
  (ii) and (iv)         done clear
  D)
         (i) and (iv) done clear
  View Solution play_arrow

• question_answer45)
  Match column-I with column-II and select the correct answer using the codes given below.                        

  	Column-I		Column-II
  A.	Transpiration	I.	Uses energy to pump molecules against a concentration gradient.
  B.	Guttation	II.	Active absorption of water.
  C.	Exudation	III.	Loss of water vapour from plant parts.
  D.	Active transport	IV.	Loss of liquid water from leaves.
  		V.	Loss of water from parts injured plant.

             
  A)
  A-I;     B-II;     C-III;     D-V done clear
  B)
  A-II;    B-I;      C-IV;    D-III done clear
  C)
  A-III;    B-IV;   C-V;     D-I done clear
  D)
  A-IV;   B-V;    C-II;      D-III done clear
  View Solution play_arrow

• question_answer46)
  According to Steward's starch hydrolysis theory, which one of the following is the principal reason for the opening of stomata during daytime?
  A)
  Influx of \[{{K}^{+}}\] ions into guard cells under the influence of ABA hormone. done clear
  B)
  Conversion of sugar into starch in guard cells done clear
  C)
  Efflux of \[{{K}^{+}}\] ions from guard cells under the influence of ABA hormone. done clear
  D)
  Photosynthetic utilisation of \[C{{O}_{2}}\] in guard cells. done clear
  View Solution play_arrow

• question_answer47)
  What will happen if stem of plant is cut under state of tension in xylem sap?  
  A)
  The xylem sap will flow out. done clear
  B)
  Xylem sap will accumulate at cut surface. done clear
  C)
  The cut surface will form air bubbles, when placed in water. done clear
  D)
  Air will be pulled into the xylem. done clear
  View Solution play_arrow

• question_answer48)
  According to the transpiration-cohesion theory the upward pull of water is transferred to other water molecules by cohesion, which is caused by?
  A)
  Hydrogen bond   done clear
  B)
        Turgor pressure   done clear
  C)
        Hydrophilic cell walls                   done clear
  D)
  Osmosis done clear
  View Solution play_arrow

• question_answer49)
  A group of students are studying the transport of certain type of molecules in a cell. They observe that the transport slows down when the cells are treated with poison, a chemical, which inhibits energy production. But when studying molecules, which are in normal conditions, it is estimated that molecules are probably transported by the process of?
  A)
  Osmosis             done clear
  B)
         active transport                         done clear
  C)
  Facilitated diffusion         done clear
  D)
  simple diffusion done clear
  View Solution play_arrow

• question_answer50)
  Examples of bulk flow by a positive hydrostatic pressure gradient and a negative hydrostatic pressure gradient are:    
  A)
  Suction through straw and swelling of wood, respectively. done clear
  B)
  Imbibition and a garden hose. done clear
  C)
  Garden hose and suction through a straw, respectively. done clear
  D)
  Swelling of wood and imbibition, respectively. done clear
  View Solution play_arrow

• question_answer51)
  Which of the following is incorrect for the carrier molecules involved in facilitated diffusion?               
  A)
  They increase the speed of transport across a membrane. done clear
  B)
  They concentrate solute molecules on one side of the membrane. done clear
  C)
  They have specific binding sites for molecules they transport. done clear
  D)
  They may undergo conformational change upon binding of solutes. done clear
  View Solution play_arrow

• question_answer52)
  Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch

  (i-v) make it useful as a storage material?

  (i) Easily translocated

  (ii) Chemically non-reactive

  (iii) Easily digested by animals

  (iv) Osmotically inactive

  (v) Synthesised during photosynthesis

  A)
  (ii) and (iii)         done clear
  B)
         (ii) and (iv) done clear
  C)
  (i), (iii) and (v) done clear
  D)
         (i) and (v) done clear
  View Solution play_arrow

• question_answer53)
  Aquaporins are:
  A)
  Cytoplasmic connections between cortex cells. done clear
  B)
  Openings in the lower epidermis of leaves through which water vapour escapes. done clear
  C)
  Openings into root hairs through which water enters. done clear
  D)
  Water specific channels in membranes that may regulate the rate of osmosis. done clear
  View Solution play_arrow

• question_answer54)
  At the endodermis, water movement through the apoplast pathway is obstructed by which labelling?
  A)
  1                      done clear
  B)
         2 done clear
  C)
  3                      done clear
  D)
         4 done clear
  View Solution play_arrow

• question_answer55)
  Read the following statements.

  (i) Most minerals must enter the cytoplasm and epidermal cells of roots by active absorption.

  (ii) Ions are absorbed by both passive and active transport.

  (iii) Active absorption does not require energy.

  (iv) Active uptake of ions is responsible for osmosis.

  Choose the correct option in reference to the statements given above.

  A)
  (i) and (ii) are correct and (iii) and (iv) are incorrect done clear
  B)
  (i), (ii) and iv are correct and (iii) is incorrect done clear
  C)
  (i),(ii),(iii) and (iv) done clear
  D)
  (i), (iii) and (ii) are correct (iv) is incorrect done clear
  View Solution play_arrow

• question_answer56)
  Passive absorption of water by root system is the result of:
  A)
  Tension on the sap due to transpiration. done clear
  B)
  Osmotic force in the shoot system. done clear
  C)
  Force created in the cells of the root. done clear
  D)
  Increased respiratory activity in root cells. done clear
  View Solution play_arrow

• question_answer57)
  What mechanism explains the movement of sucrose from source to sink?
  A)
  Evaporation of water and active transport of sucrose from the sink. done clear
  B)
  Osmotic movement of water into the sucrose-loaded sieve-tube cells creating a higher hydrostatic pressure in the source than in the sink. done clear
  C)
  Tension created by the differences in hydrostatic pressure in the source and sink. done clear
  D)
  Active transport of sucrose through the sieve-tube members driven by proton pumps. done clear
  View Solution play_arrow

• question_answer58)
  Starch is insoluble in water, yet it is accumulated in large quantities in potato tuber because:
  A)
  it is useful for storage.    done clear
  B)
  starch is synthesised in tubers. done clear
  C)
  tubers respire slowly. done clear
  D)
  it is translocated in the form of sugar from leaves. done clear
  View Solution play_arrow

• question_answer59)
  The translocation of organic solutes in sieve tube members is supported by:
  A)
  P-proteins. done clear
  B)
  Mass flow involving a carrier and ATP. done clear
  C)
  Cytoplasmic streaming. done clear
  D)
  It is translocated in the form of sugar from leaves done clear
  View Solution play_arrow

• question_answer60)
  What will be the effect of accumulation of \[{{K}^{+}}\] ions in guard cells?          
  A)
  Loss of turgidity done clear
  B)
  Exosmosis done clear
  C)
  Water potential increases done clear
  D)
  Water potential decreases done clear
  View Solution play_arrow

• question_answer61)
  Root pressure is higher when:
  A)
  Transpiration is very low and absorption is high. done clear
  B)
  Transpiration is very high and absorption is high. done clear
  C)
  Transpiration is low and absorption is low. done clear
  D)
  Transpiration is high and absorption is low. done clear
  View Solution play_arrow

• question_answer62)
  Opening of stomata is affected by:
  A)
   Light done clear
  B)
                     \[{{K}^{+}}\] ions done clear
  C)
  \[C{{O}_{2}}\]             done clear
  D)
         All of the above done clear
  View Solution play_arrow

• question_answer63)
  Ganong's potometer is used to measure:
  A)
  Photosynthesis done clear
  B)
         Respiration done clear
  C)
  Transpiration      done clear
  D)
         Guttation done clear
  View Solution play_arrow

• question_answer64)
  In terrestrial habitats, temperature and rainfall conditions are influenced by:
  A)
  Water transformations done clear
  B)
  Transpiration done clear
  C)
  Thermoperiodism done clear
  D)
  Translocation done clear
  View Solution play_arrow

• question_answer65)
  Leaves which appear wilted in the day time recover at night because:
  A)
  Light is essential for photosynthesis. done clear
  B)
  The stomata close down, temperature decrease, transpiration is reduced and the plant is able to absorb more water from the soil. done clear
  C)
  Respiration and translocation of organic substance both increase. done clear
  D)
  The plant is sleeping because of dark conditions. done clear
  View Solution play_arrow

• question_answer66)
  Which of the following shows the correct explanation of the given figures?
  A)
  Cell "A" will lose \[{{H}_{2}}O\] Cell "B" will gain \[{{H}_{2}}O\], Cell "C" neither gain nor loses\[{{H}_{2}}O\]. done clear
  B)
  Cell "A" neither gain nor loses\[{{H}_{2}}O\], Cell "B" will gain\[{{H}_{2}}O\], Cell "C" will lose\[{{H}_{2}}O\]. done clear
  C)
  Cell "A" will gain, Cell "B" neither gain nor loses\[{{H}_{2}}O\], Cell "C" lose\[{{H}_{2}}O\]. done clear
  D)
  Cell "A" will gain\[{{H}_{2}}O\], Cell "B" will lose \[{{H}_{2}}O\], Cell "C" neither gain nor loses\[{{H}_{2}}O\]. done clear
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• question_answer67)
  Read the following statements regarding porins and select the correct option given below.

  (i) Porins are transport proteins.

  (ii) Channel proteins are usually gated and are a type of transport protein.

  (iii) Carrier protein binds the particular solute to be transported.

  (iv) Particular solute is delivered to the other side of the membrane by carrier proteins.

  A)
  (i),(ii) and (iii)     done clear
  B)
  (i),(iii) and (iv) done clear
  C)
  (i),(ii),(iii)and(iv) done clear
  D)
         (i) and (iv) done clear
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• question_answer68)
  The osmotic potential and pressure potential of three cells (A, B, C) located in different parts of an actively transpiring plant are given below.

  	Cell Osmotic Potential (MPa)	Pressure Potential (MPa)
  A B C	-0.87 -0.92 -0.68	0.44 0.34 0.27

  Which of the cells (A, B, C) have the highest water potential?
  A)
  A                                  done clear
  B)
  B done clear
  C)
  C                      done clear
  D)
         All of these done clear
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• question_answer69)
  Consider the following statements and choose the correct answer from the options given below.

  (i) A dry a live seed still contains water.

  (ii) A mature maize plant absorbs about 3L water per day.

  (iii) A mustard plant take up water equal to its weight in about five hours.

  (iv) Water is not considered as the limiting factor for plant growth and productivity.

  A)
  (i), (ii), (iii) and (iv)          done clear
  B)
  (iv) and (ii) done clear
  C)
  (i), (ii) and (iii)    done clear
  D)
  Only (iv) done clear
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• question_answer70)
  The potential energy of water is referred as:
  A)
  Water potential done clear
  B)
         Osmotic potential done clear
  C)
  Gravity potential done clear
  D)
  Pressure potential. done clear
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• question_answer71)
  In a fully turgid cell:   
  A)
  \[{{\psi }_{s}}\] will be negative and \[{{\psi }_{p}}\] will be positive. done clear
  B)
  \[{{\psi }_{p}}\] will be negative and \[{{\psi }_{s}}\]will be positive. done clear
  C)
  Both \[{{\psi }_{p}}\] and \[{{\psi }_{s}}\] will be positive. done clear
  D)
  Both \[{{\psi }_{s}}\] and \[{{\psi }_{p}}\] are negative. done clear
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• question_answer72)
  Addition of solute in the cell develops:
  A)
  Turgor pressure done clear
  B)
         Osmotic pressure done clear
  C)
  Diffusion pressure done clear
  D)
         Water potential done clear
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• question_answer73)
  In rainy season, the doors get swell due to:
  A)
  Imbibition          done clear
  B)
         Absorption done clear
  C)
  Diffusion            done clear
  D)
         Endosmosis done clear
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• question_answer74)
  A negative effect of transpiration is:
  A)
  Development of water stress. done clear
  B)
  Increase in mineral absorption. done clear
  C)
  Maintenance of leaf temperature. done clear
  D)
  Causing cooling. done clear
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• question_answer75)
  Ringing experiment is related with:
  A)
  Ascent of sap     done clear
  B)
         Translocationoffood done clear
  C)
  Both [a] and [b]  done clear
  D)
  Mineral nutrition done clear
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• question_answer76)
  Which of the following theory gives the latest explanation for the closure of stomata?
  A)
  Munch theory done clear
  B)
  ABA theory done clear
  C)
  Starch glucose theory done clear
  D)
  Active \[{{K}^{+}}\] transport theory done clear
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• question_answer77)
  Root cap has no role in water absorption because:
  A)
  it has no direct connection with the vascular system. done clear
  B)
  it has no cells containing chloroplasts. done clear
  C)
  it has no root hairs. done clear
  D)
  it has loosely arranged cells. done clear
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• question_answer78)
  Passage cells are thin walled cells found in:
  A)
  Endodermis of roots facilitating rapid transport of water from cortex to pericycle. done clear
  B)
  Phloem elements that serve as entry point for substances for transport to other plant parts. done clear
  C)
  Testa of seeds to enable emergence of growing embryonic axis during seed germination. done clear
  D)
  Central region of style through which the pollen tube grows towards the ovary. done clear
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• question_answer79)
  Two cells A and B are contiguous. Cell A has osmotic pressure 10 \[atm\], turgor pressure 7 \[atm\] and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 at\[atm\], turgor pressure 3 \[atm\] and diffusion pressure deficit 5 atm. The result will be:                      
  A)
  no movement of water.   done clear
  B)
  equilibrium between the two. done clear
  C)
  movement of water from cell A to B. done clear
  D)
  movement of water from cell B to A. done clear
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• question_answer80)
  Which among the following has highest water potential?
  A)
  1 m salt solution done clear
  B)
  1 m glucose solution done clear
  C)
  Distilled water done clear
  D)
  None of the above done clear
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• question_answer81)
  Which one of the following is a driving force for the process of passive absorption of water in roots?
  A)
  The increase in imbibitional pressure in root cells done clear
  B)
  Root pressure done clear
  C)
  Activity of aquaporions done clear
  D)
  Transpiration in leaves done clear
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• question_answer82)
  Which one of the pathways of water movement involves cell wall and intercellular spaces?
  A)
  Vacuolar pathway done clear
  B)
         Protoplast pathway done clear
  C)
  Symplast pathway          done clear
  D)
  Apoplast pathway done clear
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• question_answer83)
  Stomatal opening is affected by:
  A)
  Nitrogen concentration, carbon dioxide concentration and light. done clear
  B)
  Carbon dioxide concentration, temperature and light. done clear
  C)
  Nitrogen concentration, light and temperature. done clear
  D)
  Carbon dioxide concentration, nitrogen concentration and temperature. done clear
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• question_answer84)
  Sunken stomata are usually found in:
  A)
  Phanerograms done clear
  B)
         Insectivorous plants done clear
  C)
  \[{{C}_{3}}\] plants       done clear
  D)
         CAM plants done clear
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• question_answer85)
  In both transpiration and evaporation, water is lost in the form of vapour yet they differ, because:
  A)
  Both transpiration and evaporation are similar but the rate of water loss differs. done clear
  B)
  Frequency of water loss is different in both of them. done clear
  C)
  Transpiration is a physical process and evaporation is a physiological process. done clear
  D)
  Transpiration is a physiological process and evaporation is a physical process. done clear
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• question_answer86)
  Identify the correct relationship with reference to water potential of a plant cell?
  A)
  \[{{\psi }_{w}}={{\psi }_{m}}-({{\psi }_{s}}+{{\psi }_{p}})\]    done clear
  B)
  \[{{\psi }_{w}}={{\psi }_{m}}-{{\psi }_{s}}-{{\psi }_{p}}\] done clear
  C)
  \[{{\psi }_{w}}={{\psi }_{m}}+{{\psi }_{s}}+{{\psi }_{p}}\] done clear
  D)
  \[{{\psi }_{w}}={{\psi }_{m}}+({{\psi }_{s}}-{{\psi }_{p}})\] done clear
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• question_answer87)
  Read the following statements and choose the correct option given below:

  (i) Surface/margin of leaves is a major area for transpiration.

  (ii) Little amount of water is lost through stem, this is referred to cauline transpiration.

  (iii) Transpiration is comparatively a slow process then evaporation.

  (iv) Transpiration driven ascent of sap does not depend on cohesion, adhesion and surface tension properties of water

  A)
  (i), (ii),(iii) and (iv)           done clear
  B)
  (i), (iii) and (ii) done clear
  C)
  (i), (ii) and (iii) done clear
  D)
         (ii), (iii) and (iv) done clear
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• question_answer88)
  Match the terms of column-I with the appropriate terms of column-II.

  	Column-I		Column-II
  A.	\[{{K}^{+}}\]pump theory	I.	Semi-permeable membrane
  B.	Plasmolysis	II.	Hydathodes
  C.	Imbibition	III.	Stomatal movement
  D.	Guttation	IV.	Exosmosis
  E.	Osmosis	V.	Hydrophilic colloids

  A)
  A- III;   B - IV;    C - V;       D - II;    E -1 done clear
  B)
  A-I;      B-II;       C-III;         D-IV;    E-V done clear
  C)
  A-II;      B-III;     C-V;          D-I;       E-IV done clear
  D)
  A-IV;    B-V;      C-II;          D-III;     E-I done clear
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• question_answer89)
  Match the following columns.

  	Column-I		Column-II
  A.	Relay Pump Theory	I.	Stocking
  B.	Transpiration Cohesion	II.	Sir J. C. Bose
  C.	Mass Flow Theory	III.	Godlewski
  D.	Pulsation Theory	IV.	Dixon and Jolly
  E.		V.	Ernst Munch

  A)
  A-III; B-II; C-V; D-I done clear
  B)
  A-II; B-I; C-V; D-III done clear
  C)
  A-III; B-IV; C-V; D-II done clear
  D)
  A-IV; B-III; C-I; D-II done clear
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• question_answer90)
  Identify the correct statements from the following.

  (i) Accumulation of \[{{K}^{+}}\] ions in the guard cells does not require energy.

  (ii) A high pH favours stomatal opening.

  (iii) Movement of chloride ion into guard cells as in response to the electric differential created by \[{{K}^{+}}\] ions.

  (iv) With entry of several \[{{K}^{+}}\] ions and chloride ions, water potential of guard cell increases.

  The correct combination is:

  A)
  (i) and (iii)          done clear
  B)
         (i) and (ii) done clear
  C)
  (ii) and (iii)      done clear
  D)
         (iii) and (iv) done clear
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• question_answer91)
  Transpiration ratio is the ratio of moles of \[{{H}_{2}}O\] transpired/moles of \[C{{O}_{2}}\] fixed. This ratio is measure of: 
  A)
  The efficiency of guard cells on stomatal movement. done clear
  B)
  Effectiveness of stomata is maximizing photosynthesis while minimising water loss. done clear
  C)
  Distinguishing a xerophyte from a glycophyte. done clear
  D)
  Stomatal pore size of the leaves. done clear
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