1149 + Interview Questions in TRANSPORT-IN-PLANTS IN GENERAL AWARENESS Page 23 InterviewSolution

1101.	Calvin along with J.A. Bassham studied reactions in green plants forming sugar and other substances from raw materials like carbon dioxide, water and minerals by labelling the carbon dioxide withA. `O^(18)`B. `C^(12)`C. `C^(14)`D. `O^(16)`
Answer» Correct Answer - C Calvin along with J. A. Bassham studied reactions in green plants forming sugar and other substances from raw materials like carbon diosxide, water and minerals by labelling the carbon dioxide with `C^(14)`

Discussion

1102.	Cell A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will beA. A to BB. No movementC. B to AD. Equal movement in both direction.
Answer» Correct Answer - C

Discussion

1103.	Cell A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will beA. from cell B to cell AB. from cell A to cell BC. no flow of waterD. in both the directions
Answer» Correct Answer - B The water potential is the chemical potential of water, which is equivalent to DPD with negative sign. Therefore, water potential `(Psi_(A))` of cell A= `Psi_(A)=Psi_(s)+Psi_(P)= -18+8= -10` water potential of cell `B(Psi_(B))=Psi_(B)=Psi_(s)=Psi_(P)= -14+2= -12` Since, water moves from higher water potentail to lower potential the flow of water will be from cell A(-10 bars) to cell B (-12 bars).

Discussion

1104.	Match the theories given in column I with the names of scientists listed in column II. Choose the answer which gives the correct combination of the alphabets A. A = r, B = s, C = t, D = qB. A = s, B = r, c = p, d = qC. A = r, B = q, C = t, D = qD. A = q, B = p, C = t, D = r
Answer» Correct Answer - A

Discussion

1105.	It a cell with a solute potential of `-0.2` Mpa and a pressure potential of 0.4 Mpa is placed in a chamber filled with pure water that is pressurised with 0.5 Mpa what is likely to happenA. water will flow out of the cellB. water will flow into the cellC. cell wall will be crushedD. the cell will explode
Answer» Correct Answer - B Here, the water potential of cell is `-0.2+0.4=-0.2`. On the other hand water potential of external solution is 0, but when it is pressurised with 0.5 Mpa its water potential increases. Since, water flow from higher water potential to low water potential, water will flow into the cell.

Discussion

1106.	Describe the role played by protein pumps during active transport in plants.
Answer» In plant memebranes the carrier protein molecules are embedded in the lipid layer they use energy to pump molecules against a concentratio gradient thus they are called protein pumps the transport of ions across plant memebraces through these protein pumps which involve energy is called active transport

Discussion

1107.	The lower surface of leaf will have more number of stomata in aA. Doorsiventral leafB. Isobilateral leafC. Both a and bD. None of the above
Answer» Correct Answer - a

Discussion

1108.	The following diagram represent the pathway of water movement in the root. Identify A, B, and C respectively A. Plasmodesmata, Casparian strip, EndodermisB. Tight junction, Casparian strip, EndodermisC. Gap junction, Casparian strip, EndodermisD. Desmosome, Casparian strip, Endodermis
Answer» Correct Answer - A

Discussion

1109.	Find the correct pathway of movement of water in given presentation of cells . A. B. C. D.
Answer» Correct Answer - B

Discussion

1110.	In which part of the plant water is stroedA. rootsB. stemC. leavesD. bark
Answer» Correct Answer - c

Discussion

1111.	The pathway of water movement, involing living part of a cell isA. Apoplast pathwayB. symplast pathwayC. transmembrane pathwayD. lateral conduction
Answer» Correct Answer - B

Discussion

1112.	The food stroed in the ripening fruit is derived fromA. rootsB. farthest leavesC. nearest leavesD. aerial stem
Answer» Correct Answer - c

Discussion

1113.	In cell transport the difference between permeable transport and bulk transport relate4s toA. structure of molecules allowed to pass throughB. solvent system as well as structure of molecules are applicableC. solvent system is applicableD. molecular weight of atoms allowed to pass through
Answer» Correct Answer - a

Discussion

1114.	Most of the water flow in the root takes place via the apoplast becauseA. Cortical cells are loosely arrangedB. Cortical cells are living cellsC. Cortical cells are thin walled cellsD. All of the above
Answer» Correct Answer - A

Discussion

1115.	Most water flow in root occurs via apoplast asA. Cortical cells are living cellsB. Cortical cells are loosely arrangedC. Cortical cells are thin walledD. All of the above
Answer» Correct Answer - B Most water flow in root occurs via apoplast as cortical cells are loosely arrantged.

Discussion

1116.	At the endodermis, water movement via apoplast is interreptud because ofA. caspaian stripB. plasma membraneC. low water potentialD. low turgor presure
Answer» Correct Answer - A

Discussion

1117.	Casparian strips are impregnated withA. suberinB. waxC. ligninD. cellulose
Answer» Correct Answer - A

Discussion

1118.	Stomatal transpiration account forA. 85-90% of total transpirationB. 3-10% of total tanspirationC. 100% of total transpirationD. 1-2% of total transpiration
Answer» Correct Answer - A

Discussion

1119.	The plant in which both kidney-shpaed and dumbell-shaped stomata are found isA. CyperusB. maizeC. wheatD. Euphorbia
Answer» Correct Answer - A

Discussion

1120.	A slice of Suger Beet placed in cencentrated salt solution wouldA. Become swollenB. Lose water and become flaccidC. Absorb small quantity of waterD. Show no change .
Answer» Correct Answer - B

Discussion

1121.	What would happen if a thin slice of sugar beet is kept in NaClA. It should lose water from the cellB. It should become turgidC. It should neither absorbed water nor lose itD. It should absorb water from the soil solution
Answer» Correct Answer - A

Discussion

1122.	Opening and closing of stomata is due toA. Hormonal change in guard cellsB. Change in turgor prssure of guard cellsC. Gaseous exchangeD. Respiration
Answer» Correct Answer - B

Discussion

1123.	The figure indicates the ringing ro girdling experiment. Bark having phloem is removed. This experiment proves that phloem is the pat for translocation of food. In this experiment swollen part of stem has been shown. The possible cause of this swollen is A. Injured parts undergo turgidityB. a repairing mechanism is taken placeC. Accumulation of water and mineral just above the ringD. Accumulation of food material just above the ring (as downward movement of food is inhibited)
Answer» Correct Answer - d

Discussion

1124.	Assertion : In the ringing experiment, a narrow, continuous band of tissues external to they xylem is removed. Reason : Ringing experiment proves that xylem is involved in water transport.A. Both the Assertion and Reason are true and Reason is the correct explanation of the Assertion.B. Both Assertion and Reason are true, but Reason is not the correct explanation of assertionC. Assertion is true, but Reason is falseD. Assertion is false, but Reason is true
Answer» Correct Answer - A In ringing eperiment, a continuous band of tissues external to the xylem is removed. When such plant is placed in the light, then after sometimes, the tissue above the ring become swollen due to the accumulation of solutes because, due to swelling, solutes can not transport towards the root side

Discussion

1125.	The process of guttation takes placeA. when the root pressure is high and the rate of transpiration is lowB. when the root pressure is low and the rate of transpiration is highC. when the root pressure equals the rate of transpirationD. when the root pressure as well as rate of transpiration are high.
Answer» Correct Answer - A The process of exudation of liquid drops from the edges of leaves is called guttation. Usually it occurs through stomata-like pores called hydathodes. It is this process by which fully turgid plants remove extra water. The cause of guttation is mainly roots pressure (when the roots pressure is high and rate of transpiration is low, guttation take place). Hydathodes are stomata-like pores generally present at the tips or margins of leaves of those plants that grow in moist shady places (e.g. Tropaeolum).

Discussion

1126.	Stomatal opening and closing involves the role of various ions. In the given figure arrows depict the movement of certain ions during stomatal opening in light. Identify the ions `(P,Q,R and S)` and select the correct option. A. `{:(P,Q,R,S),("Malate"^(2-),K^(+),CI^(-),H^(+)"):}`B. `{:(P,Q,R,S),(K^(+),H^(+),CI^(-),"Malate"^(2-)):}`C. `{:(P,Q,R,S),(H^(+),K^(+),CI^(-),"Malate"^(2-)):}`D. `{:(P,Q,R,S),(K^(+),"Malate"^(2-),H^(+),CI^(-)):}`
Answer» Correct Answer - C In light, Starch is converted into phosphoenol pyruvic acid `(PEP)` in the pressure of `PEP`case enzyme. `PEP`combines with `CP_(2)` to form OAA and then malic acid. Malic acid dissociates into malate ions `(malate^(2-))` and `H^(+)` ions in the guard cells. `H^(+)` ions are transported to epidermal cells and `K^(+)` ions are taken into the guard cells in exchange of `H^(+)` (ion exchange). Some `CI^(-)` ions are also taken in to neutralize some of the `K^(+)` ions. `H^(+) - K^(+)` exchange is an active process which involves inolvement of `ATP`. Increased `K^(+)` and malate ion concentration in the vacuole of guard cells causes sufficient osmotic pressure to absorb water from surrounding cells, resulting in increased turgor of guard cells and thus opening of stomata.

Discussion

1127.	In plants opening of stomata is regulated byA. Red lightB. Bule lightC. Far-red lightD. Ultraviolet light .
Answer» Correct Answer - C

Discussion

1128.	The cause of the opening or closing of the stomata mainly depends on change in the turgidity ofA. MicrofibrilsB. Guard cellsC. Epidermal cellsD. Xylem
Answer» Correct Answer - B

Discussion

1129.	In a plant cell DPD is zero when it is â€¦â€¦â€¦..A. PlasmolysedB. TurgidC. FlaccidD. Incipient
Answer» Correct Answer - C

Discussion

1130.	If a cell `A` with `DPD=5` bars is connected to cells `B,C` and `D` whose `OP` and `TP`are respectively `5` and `5,10` and `4` and `8` and `3` the flow of water will beA. DB. CC. BD. A.
Answer» Correct Answer - A

Discussion

1131.	A and B cells are contiguous. Cell A has OP=10 atm, TP=7 atm and DPD=3 atm. Cell B has OP=8 atm. TP=3 atm and DPD=5 atm. The result would beA. No movement of waterB. Equailibrium between the twoC. Movement of water from A to BD. Movement of water from B to A
Answer» Correct Answer - C

Discussion

1132.	Arrange root hair cell, inner cortical cell and mesophyll cell in ascending order of DPDA. Mesophyll cell, Root hair cell and Cortical cellB. Cortical cell, Mesopphyll cell and Root hairC. Root hair cell , Cortical cell and Mesophyll cellD. Root hair cell, Mesophyll cell and Cortical cell
Answer» Correct Answer - C

Discussion

1133.	DPD is equal toA. `OPxxTP`(WP)B. OP+TP(WP)C. OP-TP(WP)D. TP(WP)-OP.
Answer» Correct Answer - C

Discussion

1134.	The main difference in DPD and `Psi_(W)` isA. DPD has negative and `Psi_(W)` has positive value.B. DPD depends on concentration of solvent wheras `Psi_(W)` on concentration of solute.C. The direction of movement is from low DPD to high DPD but in `Psi_(W)` it is from high `Psi_(W)` to low `Psi_(W)` .D. All of the above .
Answer» Correct Answer - C

Discussion

1135.	The membrane which allows passage of certain substances more readily than others is termed asA. ImpereableB. SemisolidC. PermeableD. Selectively permeable
Answer» Correct Answer - D

Discussion

1136.	The plasmalmma of the cell is aA. fully permeable membraneB. selectively permeable membraneC. semipermeable membraneD. impermeable membrane
Answer» Correct Answer - B

Discussion

1137.	The external solution having more concentration then the cell sap is calledA. Hypertonic solutionB. Isotonic solutionC. Hypotonic solutionD. None of the above
Answer» Correct Answer - A

Discussion

1138.	The membrane that allows some of solute molecules to pass through it and prevent others is calledA. Permeable membraneB. Semipermeable membraneC. Selectively or differentially permeable membrane.D. Impermeable membrane
Answer» Correct Answer - C

Discussion

1139.	The membrane which allows only water molecules to pass through it and no solute molecules is calledA. semipermeable membraneB. selectively permeableC. impermeable membraneD. permeable membrane
Answer» Correct Answer - A

Discussion

1140.	A membrane, which permits the solvent and not the solute to pass through it is termed asA. permeableB. impermeableC. semipermeableD. differentially permeable
Answer» Correct Answer - C

Discussion

1141.	The membrane which allows the solvent molecules to pass through it and not the solute molucules is calledA. Impermeable membraneB. Semipermeable membraneC. Permeable membraneD. None of the above
Answer» Correct Answer - B

Discussion

1142.	By which mechanism, the salt resistant plants can get rid off excess `Na^(+)` ions to the outer side, through the roots ?A. `H^(+)`-ATPase uniport systemB. `Na^(+)`- uniport systemC. `H^(+)- Cl^(-)` sympart systemD. `Na^(+)- H^(+)` antiport system
Answer» Correct Answer - D The salt resistant plants get rid off excess `Na^(+)` ions to the outside throught the roots by `Na^(+)-H^(+)` antiport system.

Discussion

1143.	In transpirationA. upward movement of water by roots will stopB. turgidity of the cell will be lostC. all metabolic processes will stopD. upward movement of water by roots will continue and all the metabolic processes will occurs as usual
Answer» Correct Answer - D

Discussion

1144.	Guard cells cannot assimilate food, because of the absence ofA. phosphate dehydrogenaseB. isomeraseC. RuBisCOD. Both (a) and (c )
Answer» Correct Answer - D

Discussion

1145.	The cavity formed outside the guard cells of leaf is named asA. substomatal cavityB. epistomatal cavityC. amphistomatic cavtiyD. None of these
Answer» Correct Answer - B

Discussion

1146.	Based on the figure given below which of the following statements is not correct A. Movement of solute molecules will take place from chamber A to BB. Movement of solute will take place from A to BC. Presence of a semipermeable is a prerequisite for this process to occurD. The direction and rate of osmosis depend on both the pressure gradient and concentration gradient
Answer» Correct Answer - B

Discussion

1147.	To initiate cell plasmolysis, the salt solution should beA. IsotonicB. hypertonicC. hypotonicD. none of these.
Answer» Correct Answer - B

Discussion

1148.	Simple diffusion is related to all , exceptA. Involvement of carriersB. Occurs along concentration gradientC. Continues till an equilibrium is establishedD. Downhill movement
Answer» Correct Answer - A

Discussion

1149.	What role does root pressure play in water movement in plants?
Answer» Root pressure is the positive pressure that develops in the roots of plants by the active absorption of nutrients from the soil. When the nutrients are actively absorbed by root hairs, water (along with minerals) increases the pressure in the xylem. This pressure pushes the water up to small heights. Root pressure can be observed experimentally by cutting the stem of a well-watered plant on a humid day. When the stem is cut, the solution oozes from the cut end. Root pressure is also linked to the phenomenon of guttation, i.e., the loss of water in the form of liquid droplets from the vein endings of certain herbaceous plants. Root pressure is only able to transport water up to small heights. However, it helps in re-establishing the continuous chains of water molecules in the xylem. Transpirational pull maintains the flow of water molecules from the roots to the shoots.

Discussion

Explore topic-wise InterviewSolutions in .

Calvin along with J.A. Bassham studied reactions in green plants forming sugar and other substances from raw materials like carbon dioxide, water and minerals by labelling the carbon dioxide withA. `O^(18)`B. `C^(12)`C. `C^(14)`D. `O^(16)`

Cell A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will beA. A to BB. No movementC. B to AD. Equal movement in both direction.

Cell A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will beA. from cell B to cell AB. from cell A to cell BC. no flow of waterD. in both the directions

Match the theories given in column I with the names of scientists listed in column II. Choose the answer which gives the correct combination of the alphabets A. A = r, B = s, C = t, D = qB. A = s, B = r, c = p, d = qC. A = r, B = q, C = t, D = qD. A = q, B = p, C = t, D = r

Describe the role played by protein pumps during active transport in plants.

The lower surface of leaf will have more number of stomata in aA. Doorsiventral leafB. Isobilateral leafC. Both a and bD. None of the above

The following diagram represent the pathway of water movement in the root. Identify A, B, and C respectively A. Plasmodesmata, Casparian strip, EndodermisB. Tight junction, Casparian strip, EndodermisC. Gap junction, Casparian strip, EndodermisD. Desmosome, Casparian strip, Endodermis

Find the correct pathway of movement of water in given presentation of cells . A. B. C. D.

In which part of the plant water is stroedA. rootsB. stemC. leavesD. bark

The pathway of water movement, involing living part of a cell isA. Apoplast pathwayB. symplast pathwayC. transmembrane pathwayD. lateral conduction

The food stroed in the ripening fruit is derived fromA. rootsB. farthest leavesC. nearest leavesD. aerial stem

In cell transport the difference between permeable transport and bulk transport relate4s toA. structure of molecules allowed to pass throughB. solvent system as well as structure of molecules are applicableC. solvent system is applicableD. molecular weight of atoms allowed to pass through

Most of the water flow in the root takes place via the apoplast becauseA. Cortical cells are loosely arrangedB. Cortical cells are living cellsC. Cortical cells are thin walled cellsD. All of the above

Most water flow in root occurs via apoplast asA. Cortical cells are living cellsB. Cortical cells are loosely arrangedC. Cortical cells are thin walledD. All of the above

At the endodermis, water movement via apoplast is interreptud because ofA. caspaian stripB. plasma membraneC. low water potentialD. low turgor presure

Casparian strips are impregnated withA. suberinB. waxC. ligninD. cellulose

Stomatal transpiration account forA. 85-90% of total transpirationB. 3-10% of total tanspirationC. 100% of total transpirationD. 1-2% of total transpiration

The plant in which both kidney-shpaed and dumbell-shaped stomata are found isA. CyperusB. maizeC. wheatD. Euphorbia

A slice of Suger Beet placed in cencentrated salt solution wouldA. Become swollenB. Lose water and become flaccidC. Absorb small quantity of waterD. Show no change .

What would happen if a thin slice of sugar beet is kept in NaClA. It should lose water from the cellB. It should become turgidC. It should neither absorbed water nor lose itD. It should absorb water from the soil solution

Opening and closing of stomata is due toA. Hormonal change in guard cellsB. Change in turgor prssure of guard cellsC. Gaseous exchangeD. Respiration

In plants opening of stomata is regulated byA. Red lightB. Bule lightC. Far-red lightD. Ultraviolet light .

The cause of the opening or closing of the stomata mainly depends on change in the turgidity ofA. MicrofibrilsB. Guard cellsC. Epidermal cellsD. Xylem

In a plant cell DPD is zero when it is â€¦â€¦â€¦..A. PlasmolysedB. TurgidC. FlaccidD. Incipient

If a cell `A` with `DPD=5` bars is connected to cells `B,C` and `D` whose `OP` and `TP`are respectively `5` and `5,10` and `4` and `8` and `3` the flow of water will beA. DB. CC. BD. A.

A and B cells are contiguous. Cell A has OP=10 atm, TP=7 atm and DPD=3 atm. Cell B has OP=8 atm. TP=3 atm and DPD=5 atm. The result would beA. No movement of waterB. Equailibrium between the twoC. Movement of water from A to BD. Movement of water from B to A

Arrange root hair cell, inner cortical cell and mesophyll cell in ascending order of DPDA. Mesophyll cell, Root hair cell and Cortical cellB. Cortical cell, Mesopphyll cell and Root hairC. Root hair cell , Cortical cell and Mesophyll cellD. Root hair cell, Mesophyll cell and Cortical cell

DPD is equal toA. `OPxxTP`(WP)B. OP+TP(WP)C. OP-TP(WP)D. TP(WP)-OP.

The membrane which allows passage of certain substances more readily than others is termed asA. ImpereableB. SemisolidC. PermeableD. Selectively permeable

The plasmalmma of the cell is aA. fully permeable membraneB. selectively permeable membraneC. semipermeable membraneD. impermeable membrane

The external solution having more concentration then the cell sap is calledA. Hypertonic solutionB. Isotonic solutionC. Hypotonic solutionD. None of the above

The membrane that allows some of solute molecules to pass through it and prevent others is calledA. Permeable membraneB. Semipermeable membraneC. Selectively or differentially permeable membrane.D. Impermeable membrane

The membrane which allows only water molecules to pass through it and no solute molecules is calledA. semipermeable membraneB. selectively permeableC. impermeable membraneD. permeable membrane

A membrane, which permits the solvent and not the solute to pass through it is termed asA. permeableB. impermeableC. semipermeableD. differentially permeable

The membrane which allows the solvent molecules to pass through it and not the solute molucules is calledA. Impermeable membraneB. Semipermeable membraneC. Permeable membraneD. None of the above

By which mechanism, the salt resistant plants can get rid off excess `Na^(+)` ions to the outer side, through the roots ?A. `H^(+)`-ATPase uniport systemB. `Na^(+)`- uniport systemC. `H^(+)- Cl^(-)` sympart systemD. `Na^(+)- H^(+)` antiport system

In transpirationA. upward movement of water by roots will stopB. turgidity of the cell will be lostC. all metabolic processes will stopD. upward movement of water by roots will continue and all the metabolic processes will occurs as usual

Guard cells cannot assimilate food, because of the absence ofA. phosphate dehydrogenaseB. isomeraseC. RuBisCOD. Both (a) and (c )

The cavity formed outside the guard cells of leaf is named asA. substomatal cavityB. epistomatal cavityC. amphistomatic cavtiyD. None of these

To initiate cell plasmolysis, the salt solution should beA. IsotonicB. hypertonicC. hypotonicD. none of these.

Simple diffusion is related to all , exceptA. Involvement of carriersB. Occurs along concentration gradientC. Continues till an equilibrium is establishedD. Downhill movement

What role does root pressure play in water movement in plants?