1149 + Interview Questions in TRANSPORT-IN-PLANTS IN GENERAL AWARENESS Page 12 InterviewSolution

551.	Why land plants require huge quantity of water for proper growth and development ?
Answer» Because , they lose approximately 98 percent of water absorbed by them, into air through transpiration .

Discussion

552.	Why is root pressure not an important factor for upward movemnet of water in tall trees ? Explain
Answer» The magnintude of root pressure is about 2-6 atm which is just sufficent to raise the water level up to few fet the tall tress requrie a presure of 13 to 30 atm

Discussion

553.	The sugarcane plant hasA. Dumb-bell shaped guard cellsB. Pentamerous flowersC. Reticulate venationD. Capsular fruits
Answer» Correct Answer - A

Discussion

554.	Stomatal opening or closing is due toA. Change in the turgidity of guard cellsB. The inner wall of each guard cells is thick and elasticC. Cellulose microfibrils of guard cells are oriented radiallyD. All of the above
Answer» Correct Answer - D

Discussion

555.	The force which determines the flow of water from one cell to another isA. T.S.B. D.P.D.C. O.P.D. W.P.
Answer» Correct Answer - B The force with determine the flow of water from one cell to another is D.P.D. or `Psi_(omega)`

Discussion

556.	The osmotic parameter determining flow of water from one cell to another is The actrual pressure with which water enters into cell is calledA. Osmotic pressureB. Turgor pressureC. Diffusion pressure deficitD. Hydrostatic pressure
Answer» Correct Answer - C

Discussion

557.	The force which determines the flow of water from one cell to another isA. T.P.B. D.P.D./`Psi_(omega)`C. O.P.D. W.P.
Answer» Correct Answer - B

Discussion

558.	In terrestial habitats , temperature and rain fall conditions are influenced byA. photoperiodismB. transpirationC. thermoperiodismD. translocation
Answer» Correct Answer - B

Discussion

559.	The most abundant intracellular cation isA. `K^(+)`B. `Na^(+)`C. `Ca^(+ +)`D. `H^(+)`
Answer» Correct Answer - a

Discussion

560.	The influence of metabolic inhibitors on the process of passive absorption of water isA. little and that too indirectB. little and direct effectC. strong and indirectD. strong and direct
Answer» Correct Answer - A

Discussion

561.	Match the following Columns. A. `{:(A,B,C,D,E),(2,4,5,1,3):}`B. `{:(A,B,C,D,E),(3,2,4,1,5):}`C. `{:(A,B,C,D,E),(1,2,3,4,5):}`D. `{:(A,B,C,D,E),(5,4,3,2,1):}`
Answer» Correct Answer - A

Discussion

562.	The rate of water absorption is considered to be approximately equal to the rate ofA. photosynthesisB. transpirationC. respirationD. guttation
Answer» Correct Answer - B

Discussion

563.	Match the following Columns. A. `{:(A,B,C,D),(3,2,1,4):}`B. `{:(A,B,C,D),(4,1,2,3):}`C. `{:(A,B,C,D),(1,3,2,4):}`D. `{:(A,B,C,D),(4,2,1,3):}`
Answer» Correct Answer - D

Discussion

564.	The primary osmolite which causes an opening and closing of stomata isA. SugarsB. StarchC. K-malateD. Water
Answer» Correct Answer - C

Discussion

565.	The rate of absorption is always considered to be equal to the rate ofA. photosynthesisB. transpirationC. respirationD. guttation
Answer» Correct Answer - B

Discussion

566.	Observe the following experiment After a few days, which of the following changes will have occurred A. A drop in level X and a rise in level YB. A rise in level X and a rise in level YC. A drop in level X and a drop in level YD. A rise in level X and a drop in level Y
Answer» Correct Answer - D

Discussion

567.	A professor kept some moist seeds in an airtight jar and started lecturing. At the end of the experiment an explosion occurred in the jar. What did the professor want to explainA. OsmosisB. DiffusionC. Anaerobic respirationD. Imbibition
Answer» Correct Answer - D

Discussion

568.	When beet root cylinders are washed and then placed in cold water, anthocyanin does not come out. This indicates that most likely the plasme membrane isA. permeable to anthocyaninB. impermeable to anthocyaninC. differentially permeable to anthocyaninD. dead structure
Answer» Correct Answer - B

Discussion

569.	A protion of transverse section of root is shown in the diagram label 1 to 5 and also wirte the function of parts 1,4 and 5 briefly expanin the pathwyas 2 and 3
Answer» Labelling of the parts/poathways Part1: 1. root hair ,4. endodemis and 5 casparian strip , pathways , 2. symplast 3. apoplast function of part 1,4 and 6 1. root hari the root hairs are unicellualr elongation of epidermal cells each root hari is about 0.05-1.5 mm long and 10 `mu m` wid e it has a central vaculle filled with cell sap which determines the osomotic relation of the cell root haris are specialized for absorption of water 4 endodermis it sia speical layer of laying of living cells that incloses the cascular cylinder of the root endodermis is called starch sheath in stms the major function of endodermis in roots is to prevent the loss of water and minerals 5 cas[parina strip The casparian strip present in the wasll of endodermal cells is made up of lignosuberin a waxy substance that prevent movemmnet of water and minerlas via cell wall route Pathways 2 and 3 ltbgt 2 symplat : water moves from cell to cell thorugh living cytoplasm and plasmodesmata 3 Apoplast : movement of water through non living cell walls and intercellular spaces

Discussion

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

Discussion

571.	Solute potential of a solution is alwaysA. `=0`B. `lt0`C. `gt0`D. `gt1`
Answer» Correct Answer - B solute potential of solution is always `lt0`, i.e., negative

Discussion

572.	Diffusion of water through selectively permeable membrane isA. DiffusionB. ImbibitionC. OsmosisD. Translocation
Answer» Correct Answer - C Diffusion of water through selectively permeable memebrane is osomsis.

Discussion

573.	During absorption of water by roots, the water potential of cell sap is lower than that ofA. Pure water and soil solutionB. Neither pure water nor soil solutionC. Pure water but higher than that of soil solutionD. Soil solution but higher than that of pure water.
Answer» Correct Answer - A During absortion of water by roots , the water potential of cell sap is lower than that of pur water and soil solution.

Discussion

574.	Energy source responsible for upward flow of water isA. ATPB. SucroseC. Solar heatD. Light
Answer» Correct Answer - C

Discussion

575.	Which of the following pressure is ltimetely responsible for enargement and extension gowth of cells ?A. solute potentialB. Pressure potentialC. Osmotic pressureD. Turgor pressure
Answer» Correct Answer - D Turgor pressure is ultimatelyresponsible for enlargment and extension growth of cells.

Discussion

576.	Which one explains ascent of sapA. Cohesion-tension theoty of Dixon and JolyB. Starch-Suger interconversionC. PhotosynthesisD. None of the above
Answer» Correct Answer - A

Discussion

577.	The force responsible for raising water in 100 ft tall plant isA. root pressureB. transpiration pullC. pulsationD. diffusion
Answer» Correct Answer - B

Discussion

578.	The force responsible for raising water in 100 ft tall plant isA. Transpiration pullB. Root pressureC. Air pressureD. Capillary action.
Answer» Correct Answer - A

Discussion

579.	0.1 M solution of a solute has a water potential ofA. `-2.3 bars`B. ZeroC. 2.3 barsD. 22.4 bars
Answer» Correct Answer - A

Discussion

580.	Plant cells kept in hypertonic solution will getA. LysedB. TurgidC. DeplasmolysedD. Plasmolysed
Answer» Correct Answer - D

Discussion

581.	Why is energy required to develop root pressure ?
Answer» Root pressure develps due to ctive absorption of water which requires expenditure of energy

Discussion

582.	Which is influenced by opening and closing of stomata ?A. Active water absorptionB. Passive water absorptionC. GuttationD. Rate of growth
Answer» Correct Answer - B

Discussion

583.	Root pressure occurs due toA. low DPD of leavesB. high DPD of leavesC. osmotic flow of water into xylem and absorbing part of rootD. imbibitional flow of water into xylem of absorbing part of root .
Answer» Correct Answer - C

Discussion

584.	To develop root pressure , energy is used toA. actively transport minerals into root cellsB. evaporate water in the leavesC. condense water in the xylemD. create suction in the xylem.
Answer» Correct Answer - A

Discussion

585.	During passive absorption of water , the forces originate inA. root itselfB. shootC. both root and shootD. apical bud
Answer» Correct Answer - B

Discussion

586.	Mark the correct statement .A. Passive absorption of water continues day and night and in all seasons.B. Passive absorption of water occurs during the day and stops at night in all seasons.C. Passive absorption of water occurs during the night and stops during the day time in all seasons.D. Passive absorption of water is maximum during morning and evening in all seasons .
Answer» Correct Answer - A

Discussion

587.	When soils are deficient in oxygen and have high proportion of salts or toxic substances the process of active absorptionA. increasesB. remains unaffectedC. decreasesD. stops
Answer» Correct Answer - C

Discussion

588.	In order to demonstrate root pressure, the plant is given a cutA. At the tipB. Transition zoneC. A few centimetres above the soilD. A few centimetres below the soil .
Answer» Correct Answer - C

Discussion

589.	Given diagram illustrates the changes that occur when a plant cell takes up water Identify `L,M`and `N` and select the incorrect statement the given diagram A. `N` is the diffusion pressure deficit which becomes zero when `L`and`M` re equal in magnitude.B. In a flaccid cell value of `N` becomes equal to that of `L`C. `M`represents osmotic pressure which increases when a flaccid cell takes up water.D. `L` represents solute potential which decreases with the increase in turgidity of the cell .
Answer» Correct Answer - C Given diagram illustrates the changes that occur when a flaccid plant cell takes up water. `L`represnets osmotic pressure `(OP)` or solute potential `(Psi_(s))`, M represents turgor pressure `(TP)` or pressure potential `(Psi_(rho))` and `N` represents diffusion pressure deficit `(DPD)` or water potential `(Psi_(w))`. In a flaccid cell, `TP` is zero, therefore, `DPD = OP-0=OP.` When a flaccid cell is placed in water it takes up water due to endosmosis `OP` of the cell starts decreasing while `TP` starts increasing. In fully turgid condition `OP` and `TP` become equal so that `DPD` becomes zero.

Discussion

590.	Potometers are made on the principle thatA. The amout of water transpired is approximately equal to amount of water absorbedB. The amount of water transpired is more then the amount of water absorbedC. The amount of water transpried is less then the amount of water absorbedD. Humidity causes reduction in transpiration.
Answer» Correct Answer - A

Discussion

591.	What is true ?A. ABA opens stomataB. ABA opens stomata while cytokinin closes stomataC. ABA closes while cytokinin opens stomataD. ABA and cytokinin do not affect stomata
Answer» Correct Answer - C

Discussion

592.	Guard cells lineA. StomataB. HydathodeC. PnunmatophoreD. Lenticle
Answer» Correct Answer - A

Discussion

593.	The process in which loss of water occurs in the form of water vapour isA. RespirationB. GuttationC. TranspirationD. Exosmosis
Answer» Correct Answer - C

Discussion

594.	Water will enter a cell if it is placed in solution less concentrated than cell sap due toA. EndosmosisB. DiffusionC. ImbibitionD. Plasmolysis
Answer» Correct Answer - A

Discussion

595.	Maximum water loss occurs throughA. LenticelsB. HydathodesC. StomataD. Cuticle
Answer» Correct Answer - C

Discussion

596.	Which is incorrect ?A. `Psi_(omega)=Psi_(pi)+Psi_(p)`B. `Psi_(omega)=Psi_(m)+Psi_(pi)+Psi_(p).`C. `Psi_(omega)=Psi_(s)+Psi_(p)`D. `Psi_(omega)=Psi_(m)+Psi_(pi)+Psi_(p).`
Answer» Correct Answer - D

Discussion

597.	The osmotic pressure is indicated by the Greek letterA. `Psi`B. `pi`C. `delta`D. `lamda`
Answer» Correct Answer - B

Discussion

598.	Which option is true for a fully turgid cell ?A. `OP=DPD`B. `OP=Zero`C. `DPD=Zero`D. `TP=zero`
Answer» Correct Answer - C As the cell becomes fully turgid the value of turgor pressure becomes equal to that of solute potential `(Psi_(s))` so that water potential `(Psi_(w))` or `DPD` becomes either zero or equal to that of external hypotonic solution. `Psi_(w)=Psi_(s)+Psi_(rho)=0` Though there is no net movement of water between the cell and its environment, equilibrium is dynamic and not static Equal exchange of water molecules continues between the cell and its environment.

Discussion

599.	Good soil isA. Which holds whole of the water that enters into itB. Which allows percolating the water slowly from itC. Which allows water to pass very quickly from tiD. Which allows limited amount of water to retain into it
Answer» Correct Answer - B

Discussion

600.	Water moves from a cell with `"____"DPD` to a cell with `"____"DPD.`A. higher, lowerB. lower,higherC. lower,lowerD. higher,higher
Answer» Correct Answer - B

Discussion

Explore topic-wise InterviewSolutions in .

Why land plants require huge quantity of water for proper growth and development ?

Why is root pressure not an important factor for upward movemnet of water in tall trees ? Explain

The sugarcane plant hasA. Dumb-bell shaped guard cellsB. Pentamerous flowersC. Reticulate venationD. Capsular fruits

Stomatal opening or closing is due toA. Change in the turgidity of guard cellsB. The inner wall of each guard cells is thick and elasticC. Cellulose microfibrils of guard cells are oriented radiallyD. All of the above

The force which determines the flow of water from one cell to another isA. T.S.B. D.P.D.C. O.P.D. W.P.

The osmotic parameter determining flow of water from one cell to another is The actrual pressure with which water enters into cell is calledA. Osmotic pressureB. Turgor pressureC. Diffusion pressure deficitD. Hydrostatic pressure

The force which determines the flow of water from one cell to another isA. T.P.B. D.P.D./`Psi_(omega)`C. O.P.D. W.P.

In terrestial habitats , temperature and rain fall conditions are influenced byA. photoperiodismB. transpirationC. thermoperiodismD. translocation

The most abundant intracellular cation isA. `K^(+)`B. `Na^(+)`C. `Ca^(+ +)`D. `H^(+)`

The influence of metabolic inhibitors on the process of passive absorption of water isA. little and that too indirectB. little and direct effectC. strong and indirectD. strong and direct

Match the following Columns. A. `{:(A,B,C,D,E),(2,4,5,1,3):}`B. `{:(A,B,C,D,E),(3,2,4,1,5):}`C. `{:(A,B,C,D,E),(1,2,3,4,5):}`D. `{:(A,B,C,D,E),(5,4,3,2,1):}`

The rate of water absorption is considered to be approximately equal to the rate ofA. photosynthesisB. transpirationC. respirationD. guttation

Match the following Columns. A. `{:(A,B,C,D),(3,2,1,4):}`B. `{:(A,B,C,D),(4,1,2,3):}`C. `{:(A,B,C,D),(1,3,2,4):}`D. `{:(A,B,C,D),(4,2,1,3):}`

The primary osmolite which causes an opening and closing of stomata isA. SugarsB. StarchC. K-malateD. Water

The rate of absorption is always considered to be equal to the rate ofA. photosynthesisB. transpirationC. respirationD. guttation

Observe the following experiment After a few days, which of the following changes will have occurred A. A drop in level X and a rise in level YB. A rise in level X and a rise in level YC. A drop in level X and a drop in level YD. A rise in level X and a drop in level Y

A professor kept some moist seeds in an airtight jar and started lecturing. At the end of the experiment an explosion occurred in the jar. What did the professor want to explainA. OsmosisB. DiffusionC. Anaerobic respirationD. Imbibition

When beet root cylinders are washed and then placed in cold water, anthocyanin does not come out. This indicates that most likely the plasme membrane isA. permeable to anthocyaninB. impermeable to anthocyaninC. differentially permeable to anthocyaninD. dead structure

A protion of transverse section of root is shown in the diagram label 1 to 5 and also wirte the function of parts 1,4 and 5 briefly expanin the pathwyas 2 and 3

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

Solute potential of a solution is alwaysA. `=0`B. `lt0`C. `gt0`D. `gt1`

Diffusion of water through selectively permeable membrane isA. DiffusionB. ImbibitionC. OsmosisD. Translocation

During absorption of water by roots, the water potential of cell sap is lower than that ofA. Pure water and soil solutionB. Neither pure water nor soil solutionC. Pure water but higher than that of soil solutionD. Soil solution but higher than that of pure water.

Energy source responsible for upward flow of water isA. ATPB. SucroseC. Solar heatD. Light

Which of the following pressure is ltimetely responsible for enargement and extension gowth of cells ?A. solute potentialB. Pressure potentialC. Osmotic pressureD. Turgor pressure

Which one explains ascent of sapA. Cohesion-tension theoty of Dixon and JolyB. Starch-Suger interconversionC. PhotosynthesisD. None of the above

The force responsible for raising water in 100 ft tall plant isA. root pressureB. transpiration pullC. pulsationD. diffusion

The force responsible for raising water in 100 ft tall plant isA. Transpiration pullB. Root pressureC. Air pressureD. Capillary action.

0.1 M solution of a solute has a water potential ofA. `-2.3 bars`B. ZeroC. 2.3 barsD. 22.4 bars

Plant cells kept in hypertonic solution will getA. LysedB. TurgidC. DeplasmolysedD. Plasmolysed

Why is energy required to develop root pressure ?

Which is influenced by opening and closing of stomata ?A. Active water absorptionB. Passive water absorptionC. GuttationD. Rate of growth

Root pressure occurs due toA. low DPD of leavesB. high DPD of leavesC. osmotic flow of water into xylem and absorbing part of rootD. imbibitional flow of water into xylem of absorbing part of root .

To develop root pressure , energy is used toA. actively transport minerals into root cellsB. evaporate water in the leavesC. condense water in the xylemD. create suction in the xylem.

During passive absorption of water , the forces originate inA. root itselfB. shootC. both root and shootD. apical bud

When soils are deficient in oxygen and have high proportion of salts or toxic substances the process of active absorptionA. increasesB. remains unaffectedC. decreasesD. stops

In order to demonstrate root pressure, the plant is given a cutA. At the tipB. Transition zoneC. A few centimetres above the soilD. A few centimetres below the soil .

What is true ?A. ABA opens stomataB. ABA opens stomata while cytokinin closes stomataC. ABA closes while cytokinin opens stomataD. ABA and cytokinin do not affect stomata

Guard cells lineA. StomataB. HydathodeC. PnunmatophoreD. Lenticle

The process in which loss of water occurs in the form of water vapour isA. RespirationB. GuttationC. TranspirationD. Exosmosis

Water will enter a cell if it is placed in solution less concentrated than cell sap due toA. EndosmosisB. DiffusionC. ImbibitionD. Plasmolysis

Maximum water loss occurs throughA. LenticelsB. HydathodesC. StomataD. Cuticle

Which is incorrect ?A. `Psi_(omega)=Psi_(pi)+Psi_(p)`B. `Psi_(omega)=Psi_(m)+Psi_(pi)+Psi_(p).`C. `Psi_(omega)=Psi_(s)+Psi_(p)`D. `Psi_(omega)=Psi_(m)+Psi_(pi)+Psi_(p).`

The osmotic pressure is indicated by the Greek letterA. `Psi`B. `pi`C. `delta`D. `lamda`

Which option is true for a fully turgid cell ?A. `OP=DPD`B. `OP=Zero`C. `DPD=Zero`D. `TP=zero`

Good soil isA. Which holds whole of the water that enters into itB. Which allows percolating the water slowly from itC. Which allows water to pass very quickly from tiD. Which allows limited amount of water to retain into it

Water moves from a cell with `"____"DPD` to a cell with `"____"DPD.`A. higher, lowerB. lower,higherC. lower,lowerD. higher,higher

Water moves from a cell with `""DPD` to a cell with `""DPD.`A. higher, lowerB. lower,higherC. lower,lowerD. higher,higher