InterviewSolution
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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.
| 351. |
Which of the following is not a purpose of transpirationA. Prevents lose of waterB. Helps in absorption and transportC. Makes cells rigidD. Cools leaf surfaces |
| Answer» Correct Answer - A | |
| 352. |
Who proposed blood like translocation of solutesA. SpannerB. munchC. WilliamsD. Jones |
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Answer» Correct Answer - b |
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| 353. |
Root system in a plant is well developedA. due to deficienct to auxinsB. due to deficiency of cytokininsC. due to deficiency of mineralsD. for increased absorption of water |
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Answer» Correct Answer - D Water in land plants is mainly absorbed through the roots, especially at the tips in the region of root hairs. Therefore, root system in a plant is well developed, for increasing absorption of water. |
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| 354. |
The actual pressure with which water enters into the cell is calledA. DPD has negative and `Psi_(W)` has positive value.B. OPC. WPD. Diffusion |
| Answer» Correct Answer - A | |
| 355. |
Potometer works on the principle ofA. Amount of water absorbed equals the movement transpiredB. Osmotic pressureC. Root pressureD. Potential difference between the tip of the tube and that of the plant |
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Answer» Correct Answer - A |
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| 356. |
The first process by which water enters into the seed coat when a seed is placed in suitable environment for germination is In seed germination, the first phenomenon take place isA. OsmosisB. Active transportC. AbsorptionD. Imbibition |
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Answer» Correct Answer - D |
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| 357. |
Which process is favoured by transpirationA. PhotosynthesisB. Conduction of waterC. Stomatal openingD. All the above |
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Answer» Correct Answer - B |
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| 358. |
Stomata is absent inA. Submerged plantsB. Desert plantsC. Floating plantsD. All the above |
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Answer» Correct Answer - A |
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| 359. |
Water is lost in a liquid state in some plants through hydathodes. These hydathodesA. remain closed at nightB. remain closed dayC. remian always openD. do not show any specification opening and closing |
| Answer» Correct Answer - c | |
| 360. |
Root system in a plant is well developedA. Due to deficiency of auxinB. Due to deficiency of cytokininsC. Due to deficiency of mineralsD. For increased absorption of water |
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Answer» Correct Answer - D |
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| 361. |
Sunken stomata are found in leaves ofA. TrifoliumB. LemnaC. NeriumD. Lilium |
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Answer» Correct Answer - C |
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| 362. |
Water enters a cell due toA. OPB. SPC. TPD. WP |
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Answer» Correct Answer - B Suctin pressure (also called DPD) is believed to suck water (cause movement of water molecule) from pure solvent/hypotonic solution. It is a measure of the ability of the cells to absorb water. BS Meyer (1938) cined the term suction pressure of DPD. |
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| 363. |
Assertion:Upward movement of water is called ascent of sap. Reason:Upward movement of water occurs through xylem and phloem. |
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Answer» Correct Answer - c |
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| 364. |
The translocation of organic solutes in sleve tube membres is supportted byA. cytoplasmic streamingB. root pressur and transpiration pullC. p proteinD. mas flow involving a carrier and atp |
| Answer» Correct Answer - c | |
| 365. |
The translocation of organic solutes in sleve tube membres is supportted byA. Cytoplasmic streamingB. Root pressure and transpiration pullC. P-proteinsD. Mass flow involving a carrier and ATP |
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Answer» Correct Answer - D |
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| 366. |
The translocation of organic solutes in sleve tube membres is supportted byA. Root pressure and transpiration pullB. P- proteinsC. Mass flow involving a carrier and ATPD. Cytoplasmic streaming |
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Answer» Correct Answer - C |
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| 367. |
Glycolate induces opening of stomata inA. Presence of oxygenB. Low `CO_(2)` concentrationC. High `CO_(2)`D. `CO_(2)` absent |
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Answer» Correct Answer - B |
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| 368. |
The translocation of organic solutes in sleve tube membres is supportted byA. Mass flow involving a carrier and ATPB. Cytoplasmic streamingC. Root pressure and transpiration pullD. P-proteins |
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Answer» Correct Answer - d |
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| 369. |
Which of the following have sunken stomataA. NeriumB. HydrillaC. MangoD. Guava |
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Answer» Correct Answer - A Presence of sunken stomata is an adaptive feature of xerophytic plants. These stomata are partially covered by hairs and cuticle. Sunken stomata are found in Nerium to check the transpiration. Mango is a mesophytic plant. Hydrilla is a hydrophytic plant. Guave is also a mesophytic plant. |
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| 370. |
Who demonstrated that the ascent of sap occurs due to the pulsatory activity of innermost cortical cells ?A. Janse (1887)B. JC Bose (1923)C. Strasburger (1891)D. Molisch (1928-1929) |
| Answer» Correct Answer - B | |
| 371. |
Organic substances such as sugars are translocated in the phloem. It can be demonstrated byA. DefoliationB. Ringing the stemC. GraftingD. Root prssure |
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Answer» Correct Answer - b |
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| 372. |
Glycolate induces opening of stomata inA. presence of oxygenB. low `CO_(2)` concentrationC. high `CO_(2)` concentrationD. absence of `CO_(2)` |
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Answer» Correct Answer - B Light causes photosynthesis which leads to reduction in `CO_(2)` concentration `to` synthesis` of glycolate `to` oxidation of glycolate `to` ATP synthesis `to` activation of `K^(+` pump `to` movement of `k^(+)` in guard cell `to` movement of water into guard cells `to` swelling of guard cell `to` opening of stomata. |
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| 373. |
The translocation of organic solutes in sleve tube membres is supportted byA. P-proteinsB. mass flow incolving a carrier and ATPC. cytoplasmic streamingD. root pressure and transpiration pull |
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Answer» Correct Answer - B According to mass flow hyportesis the transport of organic solutes takes place from source of sink, this transport also depends on metabolic energy. According to cytoplasmic streaming hypothesis (which was given by de Vries, 1885) the transport or organic solutes takes place by combination of diffusion and cytoplasmic streaming. Cytoplasmic stremaing carry organic solutes from one and to the other end of sieve tube. P-proteisn has a role as defence against phloem feeding inscts and sealing of damaged sieve tubes. |
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| 374. |
Osmosis can be demonstrated byA. Potato osmometerB. Thistle funnle experimentC. Cobalt-chloride papre methodD. Both A and B |
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Answer» Correct Answer - D Osmosis can be demonstrated by patato osmometer and thistle funnel experiment |
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| 375. |
Stomata of a plant open due toA. influx of hydrogen ionsB. influx of calcium ionsC. influx of potassium ionsD. efflux of potassium ions |
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Answer» Correct Answer - C Accumuulation of `K^(+)` ions in the guard cells during the day time is responsible for migration of water molecules from subsidiary cells to guard cells. This increases turgidity of guard ceils and thus stomata open. |
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| 376. |
Opening and closing of stomata is due toA. hormonal change in guard cellsB. change in turgo pressure of guard cellsC. gaseous exchangeD. respiration |
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Answer» Correct Answer - B When the guard cells become turgid, the stomata open. On the other hand, if the fuard cells loose water, these become flaccid, the inner walls sag and the pore closes. Thus stomatal movement occurs due to changes in turgor pressure of guard cells. |
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| 377. |
The experiment set up shown in the adjacent diagram is for A. The demonstration of devolopment of suction force due to transpirationB. Measuring the rate of transpirationC. The demosntration of ascent of sapD. The demonstration of anaerobic respiration |
| Answer» Correct Answer - B | |
| 378. |
Stomata of CAM plantsA. Never openB. Are always openC. Open during the day and close at nightD. Open during the night and close during the day |
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Answer» Correct Answer - D |
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| 379. |
Stomata of CAM plantsA. open during the night and close during the dayB. never openC. are always openD. open during the day and close at night |
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Answer» Correct Answer - A CAM (Crassulacean Acid Metabolism) plants open stomata only at night (when temperatures is low and humidity is high) to cause lesser loss of water (e.g. agave, opuntia, etc.) So, CAM photosynthesis is a carbon fixation pathway that evolved in some pklants as an adsptation to arid condition. |
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| 380. |
When the concentraion of solution is greater outside the cells then inside the cells,the solution outside the cells isA. IsotonicB. HypertonicC. HypotonicD. None of the above |
| Answer» Correct Answer - B | |
| 381. |
A hypothetical arrangement of plant cell (A,B,C and D) is given below Find the correct sequence of movement of water using the given valuesA. `D to B to C to A `B. `A to C to B to D `C. `D to B to A to C `D. `D to A to C to B` |
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Answer» Correct Answer - A |
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| 382. |
Stomata of CAM plantsA. Are always openB. Open during the day and close at nightC. Open during night and close during the dayD. Never open |
| Answer» Correct Answer - C | |
| 383. |
Which of the following statement is/are not true (A). In CAM plants stomata open during dark and remain closed during the day (B). Role of `Na^(+)` in stomatal opening in now universally accepted (C). The water potential of roots cells is higher than the water potential of soil (D). Capillarity theory is the most accepted thory of water movement through plants. (E). The walls of xylem vessels made up of ligno-cellulose have strong affinity for water moleculesA. B,C and E onlyB. B, C and D onlyC. A and E onlyD. |
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Answer» Correct Answer - b |
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| 384. |
Which of the following is used to determine the rate of transpiration in plantsA. Porometer/hygrometerB. PotometerC. AuxanometerD. Tensiometer/Barometer |
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Answer» Correct Answer - B Potential is used to determine rate of transpiration in plants. |
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| 385. |
Which of the following statement are not true? (a) In CAM plants, stomata open during dark and remain closed during the day. (b) Role of `Na^(+)` in stomatal opening is now universally accepted. (c) Water potential of root cells is higher than water potential of soil. (d) Capillarity theory most accepted theory of water movement through plants. (e) Wall of xylem vessels made up of lignocelluloes has strong affinity for water molecules.A. b,c and eB. b,c and dC. a, b and cD. b and c |
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Answer» Correct Answer - B In CAM plants, stomata open during dark and remain closed during the day. Role of `K^(+)` in stomatal opening is now universally accepted. Water potential of root cells is lower than water potential of soil. Cohesion-tension transpiration pull model is most accepted theory of water movement through plants. Wall of xylem vessels made up of lignocellulose has strong affinity for water molecules. |
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| 386. |
Cut pieces of beetroot do not leave the colour in cold water but do so in hot water. Explain. |
| Answer» Cut pieces of beetroot do not leave colour in cold water but do so in hot water because pigment of beetroot dissolve and diffuse readily in hot water as hot temperature help in leaking of the plasma membrane and release of beetroot pigment. | |
| 387. |
Water avbsorbed by root in order to meet the requirement of transpiration is due toA. Transpiration pullB. OsmosisC. ImbibitionD. Plasmolysis |
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Answer» Correct Answer - B Water absorbed by root in order to meet the requirement of transpiration is due to osmosis. |
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| 388. |
The following percentage of water absorbed by herbaceous plants is lost in transpirationA. 80B. 60C. 90D. 40 |
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Answer» Correct Answer - C |
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| 389. |
What will happen if the transpiration excedds the amount of water absorbed ? |
| Answer» The plants shows wilting if the transpiration exceeds the amount of water absorbed | |
| 390. |
Watre column does not rupture during ascent in tracheary elements due toA. Weak gravitational pullB. Transpiration pullC. Lignified thick wallsD. Cohesion and adhesion |
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Answer» Correct Answer - D Water column does not rupture during ascent in tracheary elements due to cohesion and adhesion. |
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| 391. |
Water entering root due to diffusion is part ofA. endosmosisB. osmosisC. passive absorptionD. active absorption |
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Answer» Correct Answer - C Most of the water is absorbed by the plants passively. The force for this type of water absorption originates in the aerial parts of the plant due to the loss of water in transpiration. The root serves only as pathway and is not acively involved in this process. |
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| 392. |
Assertion: root pressure is largely responsible for ascent of sap in herbaceous plants Reason:root pressure is caused due to diffusion pressure gradient and is maintained by the activity of living cellsA. 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 - b | |
| 393. |
Given below are assertion and reason .Assertion . Water entering a plant cell makes it turgid Reason Entry of water into cell develop wall pressure inside the cellA. If both are ture with reason being correct explanation (A).B. If both are ture with reason being correct explanation (A).C. assertion is ture but reason is wrong (C)D. And both are wrong (D) |
| Answer» Correct Answer - C | |
| 394. |
Water absorbed by root in order to meet the requirement of transpiration is due toA. Transpiration pullB. OsmosisC. ImbibitionD. Plasmolysis |
| Answer» Correct Answer - B | |
| 395. |
Watre entering root due to diffusion is a part ofA. EndocytosisB. ImbibitionC. Passive absorptionD. Active absorption |
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Answer» Correct Answer - C Water entering root due to diffusion is part of passive absorption |
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| 396. |
Water entering root due to diffusion is part ofA. EndocytisisB. OsmosisC. Passive absorptionD. Active absorption |
| Answer» Correct Answer - C | |
| 397. |
When a plant is girdled or in a ring girdled plantA. The root dies firstB. The shoot dies firstC. The root and shoot the at the same timeD. Neither the root nor the shoot will be |
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Answer» Correct Answer - a |
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| 398. |
The rate of diffusion is highest inA. gasesB. liquidsC. solidsD. Both (a) and (c ) |
| Answer» Correct Answer - A | |
| 399. |
Downward flow of organic and even some inorganic solutes takes place from the leaves through the stem byA. diffusionB. protoplasmic streamingC. mass flow of solutesD. facilitated diffusion |
| Answer» Correct Answer - C | |
| 400. |
Active transport of solute in plants refers to flow of solutes against a concentration ogradient and therefore requires input of enrgy. This energy is derived.A. Always from hydrolysis of ATPB. Not only from ATP hydrolysis but also from the collapse of a proton motive forceC. Partly form the input from ATP hydrolysis and partly form the collapse of a proton motive forceD. From the different sources depending on the soulutes |
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Answer» Correct Answer - a |
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