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.
| 501. |
Photoropic and geotropic movements are linked toA. gibberellinsB. enzymesC. auxinsD. cytokinins |
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Answer» Correct Answer - C Differential distribution of indole 3-acetic acid produces trnpical plant responses like phototropisrn and geotropism. Phototropism is directional growth movement of curvature induced by direction of light while geotropism is directional movement of curvature caused by the unilateral application of force of gravity. |
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| 502. |
Bioassay of IAA isA. Avena curvature testB. Callus testC. Leaf disc testD. amylase test |
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Answer» Correct Answer - A Bioassay of IAA is avena curvature test. |
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| 503. |
Opening of floral buds isA. Autonomic movement of variationB. Paratonic movement of growthC. Autonomic movement of growthD. Autonomic movement of locomotion |
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Answer» Correct Answer - C Opening of floral buds is autonomic movement of growth. |
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| 504. |
Which one of the following acids is a derivative of carotenoids?A. Indole-3-acetic acidB. Gibberellic acidC. Abscisic acidD. Indole butyric acid |
| Answer» Correct Answer - C | |
| 505. |
Hormone discovered through tissue culture technique isA. Auxin B. Cytoklnln C. Gibberellin D. Abscisic acid |
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Answer» Correct Answer - B Hormone discovered through tissue culture cytokinin |
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| 506. |
Which plant is LDP : -A. TobaccoB. Glycine maxC. Mirabilis jalapaD. Spinach |
| Answer» Correct Answer - D | |
| 507. |
Protienaceous pigment which is the centre of the activities concerned with light isA. PhytochromeB. ChlorophyllC. AnthocyaninD. Carotenoid |
| Answer» Correct Answer - a | |
| 508. |
Which of the folloewing is a long day plantA. MirrabilsB. Glycine maxC. Mirabils jalapaD. Spinacia oleracea (Spinach) |
| Answer» Correct Answer - d | |
| 509. |
Hypothetical florigen could be produced prematurely in long day plant by exposing it toA. Shortening of periodB. Red light during nightC. Extending dark periodD. Far red light |
| Answer» Correct Answer - B | |
| 510. |
florigen is synthesised inA. StemB. LeavesC. RootD. Fruits |
| Answer» Correct Answer - b | |
| 511. |
Which phytohormoes is synthesised in ripened fruits?A. ABAB. AuxinC. CytokininD. Ethylene |
| Answer» Correct Answer - D | |
| 512. |
Impotance of day length ( photoperiodism ) in flowering of plants was first shown inA. Cotton B. Tobacco C. LemnaD. Petunia |
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Answer» Correct Answer - B Importance of day length in flowering of plants/photoperiodism was first observed in tobacco. |
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| 513. |
Phototropic curvature is result of uneven distribution ofA. CytokininsB. AuxinC. GibberellinD. Phytochrome |
| Answer» Correct Answer - B | |
| 514. |
Assertion : The constantly dividing cells both at the root apex and the shoot apex, show the meristematic phase of growth. Reason : The cells of this region are rich in protoplasm and are without nuclei.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - c The root apex, shoot apex and many other regions have meristematic tissue. New cells are produced by mitotic divisions of the meristematic cells. These cells have cellulosic cells walls, large nucleus and rich in protoplasm. It is called the phase of cell formation or cell division. |
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| 515. |
Assertion: Phytochrome exists in two forms `P_(r)` and `P_("fr")` Reasons : `P_(r) `form stimulates and `P_("fr")` form inhibit flowering.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion.B. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If the assertion and reason is false but reason is true |
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Answer» Correct Answer - A (a) Phototropism is a paratonic directional growth movement of curvature which is inducel and determind by the direction of light stimulus. Shoots grow towards the source of light hence called positively phototropic while roots grow away from the source of light hence called negatively phototropic. |
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| 516. |
Bending of stem/coleoptile towards light or shoot of potted plant placed near a window is due toA. Greater oxygen availability to the tipB. More auxin content on the shaded side C. Greater light availability to tip D. Availability of necessary warmth to the tip |
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Answer» Correct Answer - B Bending of stem/coleoptile towards light or shoot of potted near a window is due to more auxin content on the shaded side. |
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| 517. |
Phytochrome occurs in two forms. Its stable form isA. `P_(fr)` formB. `P_(r)` fromC. Both formsD. None of these |
| Answer» Correct Answer - A | |
| 518. |
If the tip of- seedling is cut off, growth as well as bending ceases because It hampersA. respirationB. photosynthesisC. perception of light stimulusD. transpiration |
| Answer» Correct Answer - C | |
| 519. |
Name the hormone which influence the tip of coleoptile and bend it towards light |
| Answer» Correct Answer - Auxin | |
| 520. |
Phytochrome occurs in two forms. In which form it promotes the germionation of needs of some speciesA. `P_("fr") "forms"`B. `P_(r)` formsC. Both formsD. None of these |
| Answer» Correct Answer - a | |
| 521. |
Phytochrome is aA. FlavoproteinB. GlycoproteinC. LipoproteinD. Chromoprotein |
| Answer» Correct Answer - D | |
| 522. |
What do you mean by respiratory climactic? |
| Answer» The sudden sharp rise in the rate of respiration at the time of ripening of fruits is called respiratory climactic. | |
| 523. |
Which one fo the following generally acts as an antagonist to gibberellins ?A. ZeatinB. EthyleneC. ABAD. IAA |
| Answer» Correct Answer - C | |
| 524. |
Which of the following prevents falling of fruits OR Fruit and leaf drop at early stages can be prevented by the applicationA. `GA_(3)`B. NAA/AuxinC. EthyleneD. Zeatin |
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Answer» Correct Answer - b (b) abscissioon layer is producend when the auxin content falls below a minmum Application of auxin retards the abscission of leaves ,fruit branch ,etc. |
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| 525. |
Which of the following prevents falling of fruits OR Fruit and leaf drop at early stages can be prevented by the applicationA. Ethylene B. Auxins C. Gibberellic D. Cytokinins |
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Answer» Correct Answer - B Fruit and leaf drop at early stages can be prevented by the application of Auxins |
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| 526. |
Which of the following is not a function of gibberellic acid?A. BoltingB. Delayed senescenceC. Seed germinationD. Ripening |
| Answer» Correct Answer - D | |
| 527. |
Gibberellic acid induces floweringA. Some plants only B. Long day plants under short day conditions C. Short day plants under long day conditionsD. Day neutral plants |
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Answer» Correct Answer - B Gibberellic acid induces flowering in long day plants under short day conditions |
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| 528. |
Which one of the following generally acts as an antagonist to gibberellinsA. ZeathinB. EthyleneC. ABAD. IAA |
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Answer» Correct Answer - c (c ) Gibberellins and ABA are anatagonistics with each other. |
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| 529. |
Which of the following prevents falling of fruits OR Fruit and leaf drop at early stages can be prevented by the applicationA. EthyleneB. auxinsC. gibberellic acidD. cytokinins |
| Answer» Correct Answer - B | |
| 530. |
(A)_____ promotes rapid internode/petiole elongation in deep water rice plants. |
| Answer» Correct Answer - A-Ethylene | |
| 531. |
Which of the following physiological effects is caused in plants by gibberellic acid ?A. Shortening of genetically tall plants B. Elongation of genetically dwarf plants C. Rooting in stem cuttings D. Yellowing of young leaves |
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Answer» Correct Answer - B Elongation of genetically dwarf plants i: caused by gibberellic acid. |
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| 532. |
Elongation of internodes is inhibited byA. GibberellinsB. MorphacttinsC. Both (a) and(b)D. None of the above |
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Answer» Correct Answer - b (b) morphactines have inhibitory efficent on the stem elongation. Increased concentration produces dwarfing in the plants. |
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| 533. |
Boioassary for auxin isA. Hydroponics B. Potometer C. Lettuce hypocotyl elongationD. Avena coleoptile curvature |
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Answer» Correct Answer - D Auxin can be bioassayed by avena coleoptile curvature |
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| 534. |
Fruit drop is prevented by sprayingA. Auxin B. EthyleneC. Ethylene D. Cytokinins |
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Answer» Correct Answer - A Fruit drop is prevented by spraying auxin. |
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| 535. |
Abscisic acid is synthesized more abundantly inA. ChloroplastsB. Endoplasmic reticulumC. RibosomesD. Peroxisomes |
| Answer» Correct Answer - A | |
| 536. |
Boioassary for auxin isA. Avena curvataure testB. Green leaf testC. Dwarf maize testD. Cell division test |
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Answer» Correct Answer - a |
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| 537. |
The seeds which are affected by the presence of light at the time of germination are known asA. non photoblasticB. photoblasticC. light hard seedsD. positively photoblastic |
| Answer» Correct Answer - B | |
| 538. |
Auxins are abundantly produced inA. RootB. Meristematic region of the rootC. ShootD. Meristematic region of the shoot |
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Answer» Correct Answer - d |
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| 539. |
Movement of Sunflower towards the direction of Sun inA. photonastyB. phototropismC. nyctinastyD. seismonasty |
| Answer» Correct Answer - B | |
| 540. |
The growth of plants differs from growth of animals in beingA. Being localized and indefiniteB. Being indefiniteC. Having indefinite life spanD. Having definite life span |
| Answer» Correct Answer - A | |
| 541. |
Parthenocarphy is induced byA. ABAB. AuxinsC. ZeatinD. Cytokinin |
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Answer» Correct Answer - b (b) In presence of auxins unifertillzed overy get changed into fruit. |
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| 542. |
The preence of auxins in a solution could be tested byA. Avena sativa stem tip testB. Carbon tetrachoride testC. Iodine testD. Defoliation test |
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Answer» Correct Answer - a |
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| 543. |
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows A. Auxin accumulates on the shaded side, stimulating greater cell elongation thereB. Green plants need light to perform photosynthesisC. Green plants seek light because they are phototropicD. Light stimulates plant cells on the lighted side to grow faster. |
| Answer» Correct Answer - A | |
| 544. |
Plants bend towards light becauseA. they need light for photosynthesisB. they need light for respirationC. cells on the shadow side elongate moreD. light attracts them |
| Answer» Correct Answer - C | |
| 545. |
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows A. Auxin accumulated on the shaded side stimulating greater cell elongation threeB. Green plants need light to perform photosysnthesisC. Green plants seek light because they are phototropicD. Light stimulates plant cells on the lighted side to grow faster |
| Answer» Correct Answer - A | |
| 546. |
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows A. nght stimulates plant cells on the lighted side to grow fasterB. Auxin accumulates on the shaded side, stimulating greater cell elongation thereC. Green plants need light to perform photosynthesisD. Green plants seek light because they are phototropic |
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Answer» Correct Answer - B Auxin accumulates on the shaded side, stimulating greater cell elongation on only one side, to bend toward the source of light as it grows |
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| 547. |
Plant growth is unique in beingA. ClosedB. UnlimitedC. DiffuseD. Limited |
| Answer» Correct Answer - B | |
| 548. |
Examples of lateral meristems areA. Phellogen and collenchymaB. Vascular cambium and phellenC. Vascular cambium and cork cambiumD. Xylem and cork cambium |
| Answer» Correct Answer - C | |
| 549. |
If flowering is either quantitatively or qualitatively dependent on exposure to low temperature, this phenomenon is termed as |
| Answer» Correct Answer - Vernalisation | |
| 550. |
Bananas can be prevented from overripening byA. mainiaining them aL ream iemperatureB. refrigerationC. dipping in ascorbic acid solutionD. storing in a freezer |
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Answer» Correct Answer - C Ascorbic acid (vitamin-C) prevents over ripening of banana and other fruits because it is an antioxidant |
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