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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.
| 951. |
When a plant undergoes senescence, the nutrients may beA. exportedB. withdrawnC. translocatedD. none of above |
| Answer» Correct Answer - b | |
| 952. |
When a plant undergoes senescence, the nutrients may beA. accumulatedB. bound to cell wallC. translocatedD. none of these. |
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Answer» Correct Answer - C When a plants part undergoes senescenece, nutrient resource (minerals and carbohyrates) shift away or are translocated from the senescened part to other parts. In leaves at the time of senescence we observe loss of chlorophyll, RNA and protein, trasport of nutrients and then abscission |
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| 953. |
Photosynthates are translocated from source to sink organs mainly in the form ofA. GlucoseB. FructoseC. StarchD. Sucrose |
| Answer» Correct Answer - D | |
| 954. |
A : The translocation in phloem is bidirectional . R : The source and sink relationship is variable .A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)C. Assertion is true statement but Reason is false, then mark (3)D. If both Assertion and Reason are false statements , then mark (4) |
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Answer» Correct Answer - A |
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| 955. |
When a plant undergoes senescence, the nutrients may beA. exportedB. withdrawnC. translocatedD. None of these |
| Answer» Correct Answer - B | |
| 956. |
Pressure that pushes water and sugar from sugar source to sugar sink is referred to asA. translocationB. bulk flowC. transpirationD. root pressure |
| Answer» Correct Answer - B | |
| 957. |
The main mechanism of determining the direction of short distance transport within a potato tuber isA. determined by the structure and function of the tonoplast of tuber cellsB. diffusion due to concentration differences and buld flow due to pressure differencesC. not affected by temperature and pressureD. pressure flow throught the phloem |
| Answer» Correct Answer - B | |
| 958. |
Which one of the following will not directly affect transpiration?A. TemperatureB. LightC. Wind speedD. Chlorophyll content of leaves |
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Answer» Chlorophyll content will not affect the rate of transpiration. Option (a), (b) and (c) all affect the rate of transpiration. (a) Temperature increase the rate of transpiration. (b) Light quality and intensity also affect the rate of this phenomenon. (c) Wind speed higher the wind speed, more will be the rate of transpiration. |
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| 959. |
A girdled plant (upto bast) may survive for some time but it will eventually die, becauseA. water will not move downwardsB. water will not move upwardsC. sugars and other organic materials will not move downwardsD. sugars and other organic materials will not move upwards. |
| Answer» Correct Answer - C | |
| 960. |
A girdled plant (upto bast) may survive for some time but it will eventually die, besauseA. Water will not move upwardB. Water will not move downwardC. Sugars and other organic solutes will not move downwardD. Sugars and other organic solutes will not move upward |
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Answer» Correct Answer - C |
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| 961. |
A girdled plant will eventually die because ofA. Absence of downward movement of waterB. Absence of upward movement of waterC. Absence of upward supply of organic nutrientsD. Absence of downward movement of organic nutrients. |
| Answer» Correct Answer - D | |
| 962. |
A flowering plant is planted in a earthen pot and irrigated urea is added to make the plant faster but the plant dies after some time .This may be due to………………. |
| Answer» Correct Answer - Exosomosis | |
| 963. |
In a girdled plant, which of the following dies first ?A. ShootB. RootC. Both die simultaneouslyD. None, as the plant survives |
| Answer» Correct Answer - B | |
| 964. |
If a plant is gridled which part of the pnat dies first the root or the shoot ? Answer giving reason? |
| Answer» Girdling is the removal of a ring of outer tissure up to the depth of the pholem layer in a woody trunk pholem is responsible for downwardmovement of food which is stopped by girdling .The roots willnot be able get food and die first | |
| 965. |
A tree girdled up to xylem may survive for sometime, but ultimately dies becauseA. water does not move upwardsB. sugar does not move upwardsC. sugar does not move downwardsD. water does not move downwards |
| Answer» Correct Answer - C | |
| 966. |
Rate of diffusion is affected by theA. Pressure and temperatureB. Concentration gradientC. Membrane permeabilityD. All of the above |
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Answer» Correct Answer - D Rate of diffusion is affected by the pressure, temperature, concentration gradient and membrane permeability. |
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| 967. |
Diffusion rates are affected by .A. PressureB. TemperatureC. Concentration gradientD. All of these |
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Answer» Correct Answer - D |
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| 968. |
The relative rates of diffusion of substances areA. inversely proportional to the square root of their densitiesB. directly proportional to the square root of their densities .C. there is no relation between diffusion are densityD. independent of the density of medium |
| Answer» Correct Answer - A | |
| 969. |
Symplast pathway of water in plants is not related toA. Vacuolar pathB. CytoplasmC. PlasmodesmataD. Cell wall |
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Answer» Correct Answer - D |
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| 970. |
The diffusion pressure of an individual substance during independent diffusion is known asA. diffusion pressureB. partial pressureC. osmotic pressureD. turgor pressure |
| Answer» Correct Answer - B | |
| 971. |
Which of the following statement is correct?A. Organic and mineral nutrients undergo multi-directional transport.B. Water transport in phloem is unidirectional.C. Transport of minerals occurs in xylem and is multi-directional.D. During senescence nutrients move from healthy plant parts of senescing regions. |
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Answer» Correct Answer - A A Organic and mineral nutrients undergo multi-directional transport. Water transport in xylem is unidirectional. Transport of minerals occurs in xylem and is unidirectional. Druing senescence nutrients move from senescing plant parts of healthy regions. |
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| 972. |
The translocation of substances inside a cell and over short distances in the symplast is due to the process ofA. OsmosisB. ImbibitionC. diffusionD. none of the above . |
| Answer» Correct Answer - C | |
| 973. |
Over small distances, substances moved byA. DiffusionB. Cytoplasmic streamingC. Active transportD. All of the above |
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Answer» Correct Answer - D Over small distances substances move by diffusion and cytoplasmic streaming supplemented by active transport. |
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| 974. |
Transport over longer distances proceeds through the vascular system -xylem and phloem-is calledA. TranspirationB. ImbibitionC. TranslocationD. Transformation |
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Answer» Correct Answer - C Transport over longer distances proceeds through the vascular system-xylem and phloem-is called translocation. |
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| 975. |
When roots are kept in a hypertonic solution, the process of ascent of sap willA. not be affectedB. increaseC. decreaseD. stop |
| Answer» Correct Answer - D | |
| 976. |
If alcohol treated cell is kept in hypertonic solution itA. burstsB. remains sameC. plasmolysisD. None of these |
| Answer» Correct Answer - B | |
| 977. |
Fresh grapes shall shrink when they are placed inA. Hot waterB. Cold waterC. Starch waterD. Concentrated salt solution |
| Answer» Correct Answer - D | |
| 978. |
A cell, when kept in sugar solution, gets dehydrated. Then, the solution isA. hypotonicB. hyupertonicC. isotonicD. none of these |
| Answer» Correct Answer - b | |
| 979. |
A cell placed in a strong salt solution, will shrink becauseA. the cytoplasm will decomposeB. mineral salts will break the cell wallC. salt will leave the cellD. water will leave by exosmosis |
| Answer» Correct Answer - D | |
| 980. |
If the surrounding solution of the cell is hypertonic , it gets _______ |
| Answer» Correct Answer - Plasmolysed | |
| 981. |
Cells swell in______ solution and shrink in _______ ones. |
| Answer» Hypotonic , Hypertonic | |
| 982. |
Which of the following is responsible for passive guttationA. Tension-cohesion of water moleculesB. Activity of epithem tissueC. Osmotic acitvity of root hairsD. Secretion of fluid by mesophyll cells |
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Answer» Correct Answer - C |
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| 983. |
Observe the following figure After the system reaches equilibrium, Which of the following changes will have occurred A. First the level of water is hgih in tube A and than water level is decreasedB. No change is observedC. The water level is higher in side B than in side AD. The water level is higher in side A than in side B |
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Answer» Correct Answer - D |
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| 984. |
Under given suitable conditions, the DPD will be more than OPA. When OP is equal to TPB. When OP is less than TPC. When OP is greater than TPD. When TP is negative |
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Answer» Correct Answer - D |
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| 985. |
Water is necessary for…A. Content of protoplasmB. SolventC. ReagentD. All above |
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Answer» Correct Answer - D |
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| 986. |
Who proposed the retension pressure theory for the permeability of the membraneA. TraubeB. OvertonC. CockingD. None of these |
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Answer» Correct Answer - A |
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| 987. |
Transpiration- cohesion tension theory operaters inA. Active absorptionB. Passive absorptionC. Active and passive absorptionD. Apoplastic movements |
| Answer» Correct Answer - B | |
| 988. |
Ultrafiltration theory for permeability of cell membrane was put forth byA. TraubeB. RuhlandC. SachsD. None of these |
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Answer» Correct Answer - B |
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| 989. |
Cohesion-tension theory is related toA. RespirationB. Ascent of sapC. TranspirationD. Photosynthesis |
| Answer» Correct Answer - B | |
| 990. |
Cohesion theory of water movement in plants was put forth byA. MelvinB. FF BlackmanC. TW EnglemannD. Henry Dixon |
| Answer» Correct Answer - D | |
| 991. |
Plant cooling occurs due toA. AssimilationB. GuttationC. PhotorespirationD. Transpiration |
| Answer» Correct Answer - D | |
| 992. |
In hot summer day, plant cooling occurs due toA. Transport of water from root to all parts of the plantB. Loss of liquid waterC. Water loss from entire plantD. Loss of water vapours from foliar surface. |
| Answer» Correct Answer - D | |
| 993. |
A gardener forgot to water a potted plant for a day during summer, what will happen to the plant ? Do you think it is reversible ? If yes, how ? |
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Answer» If gardener forgets to water the plants, it will start it wilting (a physiological state of plant in which plant leaves droop down). If watered in time, the plant may recover and become normal. But in second condition, if watering is delayed, the plant will not recover as if it reaches at physiological wilting state, it will not recover and dies. |
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| 994. |
Read the following statements and find out the incorrect statement.A. Transpiration pull does not account for the majority of water transport, most plants meet their need by root pressureB. Water loss in liquid phase is called guttation while in vapour phase is called transpirationC. Besides the loss of water vapour in transpiration, exchange of oxygen and carbon dioxide in the leaf also oc curs through stomata.D. When guard cells becomes flaccid, stomata closes and if turgid, stomata opens. |
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Answer» Correct Answer - A Root pressure does not account for the majority of water tranport, most plants meet their need by transpiration pull Water loss is liquid phase is called guttaion while in vapour phase is called transpiration Besides the loss of water vapour in transpiration ,exchange of oxygen and carbon dioxide in the leaf also cocurs through stomata When guard cells becomes flaccids, stomata closes and if turgid, stomata opens |
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| 995. |
The hormone which promotes the outflow of potassium from guard cells isA. IAAB. gibberellinsC. ethyleneD. abscisic acid |
| Answer» Correct Answer - D | |
| 996. |
Which of the following has more imbibition powerA. CelluloseB. HemicelluloseC. FatD. Protein |
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Answer» Correct Answer - D |
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| 997. |
Mark the correct statement .A. The osmotic pressure of guard cells in highest when the stomata are open and the lowest when the stomata are closed.B. The osmotic pressure of guard cells is lowest when the stomata are open and the highest when the stomata are closed.C. The osmotic pressure of guard cells and epidermal cells surrounding it never matters for the opening of stomata .D. (2) and (3) are correct |
| Answer» Correct Answer - B | |
| 998. |
Plant (intemal) factor(s) that afffect traspiration include(s)A. Number and distribution of stomataB. Percent of open stomataC. Canopy structure and water status of the plantD. All of the above |
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Answer» Correct Answer - D Plant (internal) factors that affect tranpsiration include number and distribution of stomata, per cent of open stomata, canopy structure and water status of the plant |
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| 999. |
When plant cells are kept in a concentrated salt solution, they areA. DeplasmolysedB. PlasmolysedC. Remains as suchD. Becomes turgid |
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Answer» Correct Answer - B |
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| 1000. |
Which is incorrect for wilting ?A. It occurs in woody partsB. It occurs in herbaceous plants.C. Older leaves usually wilt before younger leavesD. All of the above . |
| Answer» Correct Answer - A | |