InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 901. |
When water moves out of the plant cell and the cell membrane of a plant shrinks away from its cell wall then this condition is known asA. plasmolysisB. exosmosisC. hydrolysisD. endosmosis |
|
Answer» Correct Answer - A Plasmolysis is the phenomenon, which takes place when water from a plant cell moves out and makes the cell membrane of a plant to shrink. It occurs when a cell is placed in a hypertonic solution due to, which water is first lost from the cytoplasm and then from the vacoule. |
|
| 902. |
A cell shrinks on being kept in a solution The solution isA. IsotonicB. HypotonicC. HypertonicD. None of the above |
| Answer» Correct Answer - C | |
| 903. |
Pulsation theory was proposed byA. GodlewskiB. J.C. BoseC. Dixon and JolyD. Arthur |
| Answer» Correct Answer - B | |
| 904. |
The term water potential was proposed byA. BoseqB. DixonC. GodlewskiD. Slatyer and Taylor |
|
Answer» Correct Answer - D |
|
| 905. |
Which statement is correctA. Osmotic pressure of solution is greater than pure solventB. Osmotic pressure of solution is lower than the pure waterC. Osmotic pressure of solution is equalD. None of these |
|
Answer» Correct Answer - A |
|
| 906. |
When water moves through a semipermeable membrane, which of the following is createdA. OPB. SPC. TPD. WP |
|
Answer» Correct Answer - A |
|
| 907. |
Select an incorrect statementA. Root pressure has never been observed in confinersB. Root pressure cannot be inhibited by using cyanide , lack of `O_(2)` and low temperatureC. Root pressure can re-establish the continuous chain of water molecules in the xylem D. Develops during early morning and night |
|
Answer» Correct Answer - B |
|
| 908. |
Force responsible for exudation of liquid drops from the margin of the leaves isA. Negative hydrostatic pressureB. Transpiration pullC. ImbibitionD. Positive pressure |
|
Answer» Correct Answer - D |
|
| 909. |
Select an incorrect statementA. Root pressure has never been observed in confinersB. Root pressure cannot be inhibited by using cyanide , lack of `O_(2)` and low temperatureC. Root pressure can re-establish the continuous chain of water molecules in the xylemD. Develops during early morning and night |
|
Answer» Correct Answer - B |
|
| 910. |
The continuity of water column in xylem is maintaned due toA. evaporation of waterB. cohesive property of waterC. pressure of air bubbles in waterD. small size of xylem vessles |
|
Answer» Correct Answer - B Cohesion is the property of water molecules to remain joined to each other. This property of water is responsible for the maintainance of continuous water column in xylem tissue. |
|
| 911. |
Number of stomata is 30 and epidermal cells 120 per unit area of a leaf. The stomatal index isA. 0.05B. 0.5C. 0.2D. 0.02 |
| Answer» Correct Answer - A | |
| 912. |
(a)What is guttation? What is the cause of guttation? (b) What are hydathodes? |
|
Answer» (a) The process of exudation of liqueid droplets form the edges fo leaves is called guttation when root pressure increases water is forced out in to intercellular spaces and flows out of the hydathodes (b)These are stomata like pores generally present at the tips or margins of leaves of leaves of those plants which grow in moist and shady places |
|
| 913. |
Assertion : Guttated liquid is found on the margins of leaves. Reason : Hydathodes involved in guttation are found on the margins.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 Guttation drops are restricted to tips or margins of the leaves. It takes place through the special structures called hydathodes. They are usually found on the margins and tips of the leaves. |
|
| 914. |
The continuity of water column in xylem is maintaned due toA. Evaporation of waterB. Cohesive property of waterC. Pressure of air bubbles in waterD. Small size of xylem vessles . |
| Answer» Correct Answer - D | |
| 915. |
The apaplast is locatedA. Outside the plasma membraneB. In the entire cytosolC. On both sides of plasma membraneD. In the plastidial content |
| Answer» Correct Answer - A | |
| 916. |
Number of stomata and epidermal cells in `1nm^(2)` area of abaxial surface of leaves a, b, c, and d are `{:("Plant","Number of stomata","Nunber of Epidermal cells"),(a,40,730),(b,60,510),(c,70,450),(d,30,620):}` lt brgt Identfiy two plants having least stomatal indexA. b and cB. a and dC. a and cD. a and b |
| Answer» Correct Answer - A | |
| 917. |
Which factor does not contribute to stmatal openingA. Light Low pHB. Low pHC. Reduced `CO_(2)`D. Water |
| Answer» Correct Answer - A | |
| 918. |
High pH favours hydrolysis ofA. starchB. glucoseC. fructoseD. malic acid |
| Answer» Correct Answer - A | |
| 919. |
Guttation differs from transpiration inA. Control by stomataB. Occurrence during daytimeC. Occurrence in vapour formD. Occurrence in liquid form |
| Answer» Correct Answer - D | |
| 920. |
Which of the following is true regarding guttation ? I. Occurs through stomata. II. Occurs through hydathodes. III. Loss of pure water. IV. Occurs mostly during night and early morning. Correct statements areA. I, II and IIIB. I and IIC. II and IVD. I and III |
| Answer» Correct Answer - C | |
| 921. |
Guttation is a process of loss of water inA. Liguid form containing dissloved mineralsB. Liquid form without dissolved mineralsC. Vapour from with mineralsD. Vapour form without minerals |
| Answer» Correct Answer - B | |
| 922. |
Chambers I and II are seperated by a senipermeable membrans. Study the given figure and choose the right option A. Chamber I has higher water potential and water will move from I to IIB. Chamber II has lower solute potential and water will move from I to IIC. Chamber I has higher solute potential and water will move from Ii to ID. Chamber II has lower water potential and water will move from II to I |
| Answer» Correct Answer - B | |
| 923. |
Which condition favours guttationA. High humidityB. Low humidityC. More teranspirationD. Bright sunlight |
| Answer» Correct Answer - D | |
| 924. |
Select the matched ones (i) Guttation-Water loss in liquid phase (ii) Adhesion- Mutual attration between water molecules (iii) Imbibition-Absorption of water by dry wood (iv) Hypotonic solution-Cells shrinkA. I,ii and and iii onlyB. ii and iv onlyC. iii and iv onlyD. I and iii only |
| Answer» Correct Answer - A | |
| 925. |
Whose water potential is less then water potential of root hair during water absorption (by root hair)A. Gravtiational waterB. Pure waterC. Vacuolar sapD. Soil solution |
| Answer» Correct Answer - C | |
| 926. |
Which of the following is a rapid type of water absorption?A. Active absorptionB. Passive absorptionC. Continuous absorptionD. Pulsationg absorption |
| Answer» Correct Answer - B | |
| 927. |
A cell when dipped in 0.5 M sucrose solution has no effect but when the same cell will be dipped in 0.5 M NaCl solution the cell willA. Increase in sizeB. Decrease in sizeC. Becomes turgidD. Gets plasmolyed |
| Answer» Correct Answer - D | |
| 928. |
The ration of osmotic pressure exerted by 1 M sucrose and 1 M NaCl solution will beA. 1B. 2C. 0.1D. 0.5 |
|
Answer» Correct Answer - D |
|
| 929. |
A cell when dipped in 0.5 M sucrose solution has no effect but when the same cell will be dipped in 0.5 M NaCl solution the cell willA. Decrease in volumeB. Increase in volumeC. No change in volumeD. None of the above |
|
Answer» Correct Answer - A Due to ionisation, the solution of electrolyte has solute particles as copmpered to a nonelectrolyte of the same strangth. |
|
| 930. |
Mango dipped in concentration NaCl solution willA. BurstB. ContractC. SwellD. No effect |
| Answer» Correct Answer - B | |
| 931. |
In which of the following plants would metabolism be hindered if the leaves are coated with wax on their upper surfaceA. HydrillaB. LotusC. PistiaD. Vallisneria |
|
Answer» Correct Answer - b |
|
| 932. |
When concentration of solutes is low in the soil, absorption of water isA. StoppedB. IncreasedC. ReterdedD. Normal. |
| Answer» Correct Answer - B | |
| 933. |
The absorption of water is not affected whenA. Soil is water logged (poorly areated )B. Soil temperature increasesC. Soil solutionis highly concentratedD. Soil water is available in maximum |
| Answer» Correct Answer - D | |
| 934. |
A cell when dipped in 0.5 M sucrose solution has no effect but when the same cell will be dipped in 0.5 M NaCl solution the cell willA. Increase in sizeB. Decrease in sizeC. Will be turgidD. Will get plasmolysed |
|
Answer» Correct Answer - b |
|
| 935. |
Active absorption of water by roots from the soil is mainly affected byA. Tension in cell sap due to transpirationB. Hydrophobic nature of root hairC. Typical tissue organisationD. Osmotic concentration of xylem sap. |
| Answer» Correct Answer - C | |
| 936. |
Which of the following factors effect the absorption of water by rootsA. Soil temperatureB. Soil aerationC. RH of the atmosphereD. All of the above |
|
Answer» Correct Answer - D |
|
| 937. |
Which one is the driving force for the process of passive absorption of water in rootsA. Root pressureB. Transpiration in leavesC. Activity of aquaporinsD. Increase in imbibitin pressure in root cells |
| Answer» Correct Answer - B | |
| 938. |
All given factors promote absorption of water by roots , exceptA. Well aerated soilB. Highly concentrated soil solutionC. Optimum soil temperatureD. Available water in soil |
|
Answer» Correct Answer - B |
|
| 939. |
Positive hydrostatic pressure developing in root xylem due to active solute accumulation is calledA. Root pressureB. Imbibition pressureC. Water potentialD. Diffusion pressure deficit |
|
Answer» Correct Answer - A |
|
| 940. |
Assertion:Only vertical movement of water is possible through xylem and tracheids. Reason:The xylem ray parenchyma is responsible for the lateral transport of water. |
|
Answer» Correct Answer - d |
|
| 941. |
In guard cells when suger is converted into starch, the stomatal poreA. Closes completelyB. Opens partiallyC. Opens fullyD. Remains unchanged |
| Answer» Correct Answer - A | |
| 942. |
In guard cells when sugar is converted into starch, the stomatal poreA. Opens fullyB. Opens partiallyC. Closes completelyD. Remains unchanged |
|
Answer» Correct Answer - C |
|
| 943. |
Guttation happens due to the development ofA. Negative hydrostatic pressure in xylemB. Positive hydrostatic pressure in xylemC. Intense transpiration pullD. Low root pressure |
|
Answer» Correct Answer - B |
|
| 944. |
Diffusion helps inA. keeping the cell wall moistB. short-distance transport of gasesC. gaseous exchange during photosynthesisD. All of the above |
| Answer» Correct Answer - D | |
| 945. |
Described the two conditon which lead ot guttation |
|
Answer» The two condition which lead t guttation are (i) Root pressure and (ii) more water absorption but less transpiration |
|
| 946. |
Asserition The roots oif transpiration is directly proportional to relativ e humidity Reason humid air increases the rate of diffusion so that the rate of transpiration increasesA. If both Assertion and Reason are true and the Reason is a correct expanation of the AssertionB. If both Assertion and Reason re true but Reason is not a correct eplanatin of the AssertionC. If Assertion is true but the Reason is falseD. If both Assertion and Reason are false |
| Answer» Correct Answer - d | |
| 947. |
Give scientific reasons to the following: A Why gutation usually occurs durig humid periods at nught or early in the morening ? B animal cells reupture whne placed in distilled water C plant cells get plasmolysed when placed in hypertonic solution |
|
Answer» A Guttation usually occurs whne conditons favour more water absorption and less transpiration the humid periods at night or early in the morning inhibit transpiration and promot water absorption B Animlas cells do not possess cellulose cell wall when placed in distilled water they absorb water due to endosmosis and swell excessive endosmosis results in the increase of turgor pressure whihc ruptures the animlas cells C Plant cells have rigid cellulose cell wall when placed in hypertonic solution they lose water due to exos osis resulting the shringking of their protoplast ultimately the protoplasm separates from the cell wasll and assumes speherical shape this condition is called plasmolysis |
|
| 948. |
How does gravitational water differ from capillary water in the soil ? Which of these is availbale to the plant? |
| Answer» Gravitational water percolates the soil layer and reaches the water table whereas capillary water is held aginst the force of gravity by capillary forces the commonly available form of water to the plants is capillary water | |
| 949. |
Identify the process occurring in I,II and II |
|
Answer» I-uniprot transport II-Antiport transport III-Symport transport |
|
| 950. |
When a plant undergoes senescence, the nutrients may beA. accumulatedB. bound to cell wallC. translocatedD. None of these |
| Answer» Senescence is the programmed death of a plant. Translocation of nutrients to different parts of the plant are withdrawn at time of senescence. | |