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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. |
Sum of growth and differentiation is considered as |
| Answer» Correct Answer - development | |
| 352. |
What the size of cells of elongation phase increases? |
| Answer» It is due to increased vocuolation. | |
| 353. |
`L_(1)=L_(0)+rt`. What does `L_(0) represent in the given expression? |
| Answer» `L_(0)` represents the length of the organs at time Zero | |
| 354. |
Intermodal elongation in sugarcane stem is promoted byA. GibberellinB. CytokininC. AuxinD. ABA |
| Answer» Correct Answer - A | |
| 355. |
Cabbage is a biennial plant which produces flowers in second year of growth. In an attempt to make it flower in a single year, four potted plants (I,II, II, and IV) of cabbage were subjected to different temperatures for several days as given in the table. `|{:("Potted plant","Temperature"),(I,5^(@)C),(II,20^(@)C),(III,30^(@)C),(IV,25^(@)C):}:|` Which potted plant will show flowering ?A. IB. IIC. IIID. IV |
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Answer» Correct Answer - A Low temperature required for vernalisation is usually `0-5^(@)C`. In nature, the plants requiring vernalisation are commonly biennials (e.g., cabbage, sugarbeet, carrot), which complete their life cycle in two years. They germinate and grow vegetatively in the first year and produce flowers in the second year of growth. These plants fulfill their cold requirement during winters. However, such biennial plants can be made to flower winters. However, such biennial plants can be made to flower in one growing season by providing low temperature treatment (i.e., `0-5^(@)C` temperature) to young plants or moistened seeds. |
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| 356. |
Four potted plants (I,II, III, and IV) of a short day plant, which has the crictical period of 14 hours, are taken and exposed to light for different time periods. The light periods given are listed in the table. `|{:("Potted plant","Photoperiod"),(I,10hrs),(II,15hrs),(III,16hrs),(IV,20 hrs):}:|` Which potted plant will show flowering after exposure to light?A. IB. IIC. IIID. IV |
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Answer» Correct Answer - A A short day plant (SDP) which has a critical period of 14 hours, will flower only if it is provided a continuous period of darkness of 14 hours, which has been given to the potted plants, more amounts of light periods are being given and thus the dark periods have been reduced to below 14 hours. |
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| 357. |
Importance of day length in flowering of plants was first shown inA. PetuniaB. LemnaC. TobaccoD. Cotton |
| Answer» Correct Answer - C | |
| 358. |
Which of the following is a cytokinin ?A. Phytochrome B. Ethylene C. Leucine D. Zeatin |
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Answer» Correct Answer - D Zeatin is a cytokinin |
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| 359. |
Negative phototropism occurs inA. Root B. Stem C. Leaf D. Flower |
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Answer» Correct Answer - A Negative phototropism occurs in root |
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| 360. |
Which of the following instrument can be used to record plant growth by seconds i.e .in faction of a minuteA. Arc auxanometerB. Arc indicatorC. Space maker discD. Cresoghaph |
| Answer» Correct Answer - d | |
| 361. |
Increased vacuolation, cell enlargement and new cell wall deposition are the characteristics of cells in_____phase of growth.A. meristematicB. elongationC. maturationD. differentitation |
| Answer» Correct Answer - B | |
| 362. |
Which of the following is difficult to measure directly?A. Increase in protoplasm contentB. Increase in surface areaC. Increase in dry weightD. Increase in volume |
| Answer» Correct Answer - A | |
| 363. |
Cytokinesis promoting active substance is called kinetin which is identified, crystallised and termed byA. F.W. Went B. E. KurosawaC. Skoog and MillerD. Charles Darwin and his son Francis Darwin |
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Answer» Correct Answer - C Cytokinesis promoting active substance is called kinetin which is identified, crystallised and termed bySkoog and Miller. |
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| 364. |
Name the plant hormones which are involved in growth promoting activities such as cell division, cell enlargement, pattern formation, tropic growth, flowering, fruiting and seed formation. |
| Answer» Correct Answer - Auxin, Gibberellin, Cytokinin | |
| 365. |
A long day plant flowers only when it is exposed toA. Red light B. Light more than critical day length C. Light equal to critical day length D. Light less than critical day length |
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Answer» Correct Answer - A A long day plant flowers only when it is exposed to light more than critical day length |
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| 366. |
Cells attaining their maximum size in terms of wall thickening and protoplasmic modifications belong toA. Meristematic phaseB. Phase of elongation C. Phase of maturation D. Both B and C |
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Answer» Correct Answer - A The cells attains maximal size in terms of wall thickening and protoplamic modification in the phase of maturation. |
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| 367. |
A green plant will turn yellow if planed in the dark. This is calledA. Phototropism B. Dormancy C. Chlorosis D. Etiolation |
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Answer» Correct Answer - D A green plant will Mm yellow if placed in the dark. This is called etiolation. |
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| 368. |
CytokininsA. Cause leaf abscissnon B. Delay leaf abscission C. Promote stomatal closing D. Promote seed dormancy |
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Answer» Correct Answer - B Cutokynin delay leaf abscission. |
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| 369. |
Winter varieties of annual plants are planted in autumn, they germinate, and over winter come out as small seedlings, resume growth in spring and are harvested around mid-summer. |
| Answer» Correct Answer - 1 | |
| 370. |
Pineapple can be made to flower in off season byA. Ethylene /NAAB. ZeatinC. Shoot dayD. temerature |
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Answer» Correct Answer - a (a) Ethylene retards the flowering in most of the plants but increase flowering in pineapple in off season. |
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| 371. |
Bennials are monocarpic plants that normally flower and die in the second season. |
| Answer» Correct Answer - 1 | |
| 372. |
Auxin -B was first isolated byA. Kogl and ErxlabenB. Kogl , Erxlaben and haagen - smithC. Miller and SkoogD. Yabuta and Sumiki |
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Answer» Correct Answer - b |
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| 373. |
6- furfuryl ammino purine 2, 4- dichorophenoxy acetic acid and indole -3 - acetic acid are examples respectively forA. Syntheic auxin ,Kinetin and natural auxin gibberellin ,natural auxinB. Gibberellin , natural auxin and kinetinC. Natural auxin ,Kinetin and synthetic auxinD. Kinethin ,synthetic auxin and natural auxin |
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Answer» Correct Answer - d |
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| 374. |
Heterophylly meansA. The appearance of different forms of leaves on the same plant speciesB. The appearance of same form of leaves on different plantsC. The appearance of same form of flower on different plantsD. The appearance of different forms of fruits on the same plant |
| Answer» Correct Answer - A | |
| 375. |
Which type of phytohormone is made up of indole compounds?A. ZeatinB. ABAC. AuxinD. Gibberellins |
| Answer» Correct Answer - C | |
| 376. |
Optimum temperature required for the proper growth in most of the plants isA. `30-45^(@)C`B. `10-20^(@)C`C. `28-30^(@)C`D. `0-10^(@)C` |
| Answer» Correct Answer - C | |
| 377. |
Find odd one w.r.t. tissues developed by the process of redifferentiationA. Secondary cortexB. Secondary xylemC. PhellemD. Phellogen |
| Answer» Correct Answer - D | |
| 378. |
Define redifferentiation. |
| Answer» The process in which dedifferentiated cells again loose their ability to divide to form permanent tissue. | |
| 379. |
Give an example of plasticity. |
| Answer» Correct Answer - Heterophylly | |
| 380. |
Write any intrinsic factor influences the development of a plant |
| Answer» Intracellular i.e., genetic and chemical substances like PGRs which are intercellular. (any one) | |
| 381. |
Who amongst the following is discoverer of auxin ?A. SkoogB. WentC. ThimannD. Lavrean |
| Answer» Correct Answer - B | |
| 382. |
Ethylene is used forA. retarding ripening of tomatoesB. hastening of ripening of fruitsC. slowing down ripening of applesD. both (b) and (c) |
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Answer» Correct Answer - b Ethylene is a fruit ripening hormone. It stimulates all the biochemical changes which take place upon fruit ripening. |
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| 383. |
Coconut water containsA. ABAB. auxinC. cytokininD. gibberellin |
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Answer» Correct Answer - c Cytokinins (Letham, 1963) are plant growth hormones which are basic in nature, either aminopurine or phenyl urea derivatives, that promote cytokinesis (= cell division) either alone or in conjuction with auxin. Coconut milk is a rich source of cytokinin. |
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| 384. |
Find out one w.r.t. differentiationA. Loss of nucleus in seiveB. Death of protoplasm in tracheary elementsC. Callus formationD. Lignification in vessels |
| Answer» Correct Answer - C | |
| 385. |
Grwoth isA. Unidirectional backwardB. ReversibleC. Unidirectional forwardD. None of the above |
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Answer» Correct Answer - c (c )Because growth is a irreversible process. |
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| 386. |
Which of the following is an example of differentiation? A. The formation of tracheaIy elements (xylem trachcids and xylem vessels)B. Formation of meristem like interfascicular cambium from fully differentiated parenchyma cellsC. Formation of meristem like cork cambium from fully differentiated parenchyma cells D. Both B and C |
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Answer» Correct Answer - A The formation of tracheary elements (xylem tracheids and xylem vessels) is an example of differentiation. |
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| 387. |
Which of the following is an example of the deditferentiation?A. The formation of tracheary elements (xylem tracheids and xylem vessels)B. Formaation of meristem like interfascicular cambium from fully differentiated parenchyma cells C. Formation of meristem like cork cambium from fully differentiated parenchyma cellsD. Both B and C |
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Answer» Correct Answer - D Formation of meristem like interfascicular cambium and cork cambium from fully differentiated parenchyma cells are example of dedifferentiation |
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| 388. |
plant grwoth in length is increased byA. Apical meristemB. Lateral meristemC. Dematogen periblemD. |
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Answer» Correct Answer - a (a) Apical meristem are found at shoot and root apex. AS a result of activity of these meristems plants increases in length |
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| 389. |
Rhizocalin is a additional hormonesubstance which is secreted byA. CotyledonsB. RootsC. LeavesD. Stem |
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Answer» Correct Answer - c |
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| 390. |
Closure of lid in Pitcher Plant is aA. Tropic movementB. Turgor movementC. Paratonic movementD. Autonomic movement |
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Answer» Correct Answer - C Closure of lid in Pitcher is a paratonic movement. |
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| 391. |
Natural growth hormoneA. NAAB. EthyleneC. 2, 4, 5-TD. 2, 4-D |
| Answer» Correct Answer - B | |
| 392. |
Assertion: Only bud and embryo can be vernalized. Reason: Vernalization requires dividing cells.A. If Both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)B. If both Assertion and reason are true but the reason is not the correct explanation of the assertion, then mark (2).C. If Assertion is true statement but reason is false, then mark (3)D. If both Assertion and reason are false statements, then mark (4). |
| Answer» Correct Answer - A | |
| 393. |
Vernalization is done atA. Low temperatureB. Low light intensityC. High temperatureD. High light intensity |
| Answer» Correct Answer - A | |
| 394. |
Which among the following is a long day plant ? Why is it so called ? Sugar beet, Sugar cane, Tomato |
| Answer» Sugar beet is a long day plant. It flowers after getting the inductive cycles of long photoperiods and short dark periods. | |
| 395. |
The wavelength of light absorbed by Pr form of phytochrome isA. 660 nmB. 720 nmC. 620 nmD. 640 nm |
| Answer» Correct Answer - A | |
| 396. |
How does pruning help in making the hedge denseA. The apical shoot grows faster after pruning.B. It releases wound hormonesC. It induces the differentiation of new shoots from the rootstock.D. It frees axillary buds from apical dominance. |
| Answer» Correct Answer - D | |
| 397. |
How does pruning help in making the hedge denseA. It frees axillary buds from apical dominanceB. The apical shoot grows faster after pruningC. It releases wound hormonesD. It induces the differentiation ot new shoots from the rootstock |
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Answer» Correct Answer - A Pruning helps in making the hedge dense as it frees the axillary buds from apical dominance. In fact, the apices of the plant axis, (e.g. shoot apex) has the highest concentration of auxin which suppresses the axillary buds while promotes th growth of apical bud. When the shoot apex is cut down through prunmg, the axillary buds grow and the hedge becomes dense |
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| 398. |
How does pruning help in making the hedge denseA. The apical shoots graows faster after pruningB. it releases would haromonesC. It induuces the differentionn of new shoots from the rookstockD. It frees axillary buds from apical dominance |
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Answer» Correct Answer - d |
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| 399. |
cytokinesis refers toA. Division of chromossomesB. Division of cytoplasmC. Division of nucleusD. None o these |
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Answer» Correct Answer - b Cytokinesis formaiton fo fcell after the karokinesis in the cytoplasm of cell. |
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| 400. |
Leaf fall can be prvented byA. FlorigenB. AuxinC. CytokninsD. Abscisic acid |
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Answer» Correct Answer - c Ctyokinins help in delaying senescence. |
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