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.
| 451. |
Name any two food plants which have winter and spring varieties. |
| Answer» Wheat, barley, rye. (any two) | |
| 452. |
Richmond-Lang effect is due toA. CytokininB. AuxinC. ABAD. All the above |
| Answer» Correct Answer - A | |
| 453. |
Richmond-Lang effect is due toA. IAAB. OKC. GAD. `C_(2)H_(4)` |
| Answer» Correct Answer - B | |
| 454. |
Seeds of winter varieties are benefitted by techniqueA. Senescence B. Photoperiodism C. Vernalisation D. Abscission |
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Answer» Correct Answer - C Seeds of winter varieties are benefitted by technique vernalisation |
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| 455. |
All the cyokinins areA. AcidicB. AminoputinessC. phenolD. Glucosides |
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Answer» Correct Answer - b Bio chemicaalu th cytokinin is aminopuines. |
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| 456. |
A chemical believed to be involved in flowering isA. Gibberellin B. Kinetin C. Florigen D. IBA |
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Answer» Correct Answer - C A chemical believed to be involved in flowering as florigen. |
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| 457. |
Richmond-Lang effect is due toA. Gibberellins B. Auxin C. Ethylene D. Kinetin |
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Answer» Correct Answer - D Richmond-Lang effect is due to kinetin. |
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| 458. |
A hypothetical chemical involved in the following of plants is or chemical agent which has important role in flowering isA. GibberellinB. KinetinC. Indole acetic acidD. Florigen |
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Answer» Correct Answer - d (d) Florigin : In the process of flowering, this hypothetically hormone is applied which is gibberellin in nature. |
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| 459. |
CytokininA. Is a hormone whose main function is the induction of cell division B. is the process of cell division C. Refers to cell movements D. Causes dormancy |
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Answer» Correct Answer - A Cytokinin is a hormone whose main function is the induction of cell division. |
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| 460. |
Which of the following induces flowering in short day plantA. GibberellinsB. CytokininC. AuxinsD. Ethylene |
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Answer» Correct Answer - b Cytokinin promots flowering in some SDP like Lemna, wolffia. |
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| 461. |
What will be effect on the phytochrome in plant subjected to continuous red light?A. Phytochrome synthesis will increaseB. Level of photochrome will decreaseC. Photochrome will be destroyedD. First 2 and then 1 |
| Answer» Correct Answer - D | |
| 462. |
The ripening of fruits can be accelerated byA. Reducing the supply of water to plant when fruits are maturingB. Increasing the supply of nitrogen to the atmosphere surrounding themC. Warming up the surrounding artificiallyD. Artificially adding ethylene gas to the atmosphere surrounding them |
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Answer» Correct Answer - d (d) Ethylene is unique in that it found only in gaseous form and acccelerates ripening of fruits, leaves abscission and promotes senescence |
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| 463. |
Agent orange isA. Weedicide with dioxin B. Chemical used in luminous paintC. Biodegradable insecticideD. Colour used in fluorescent lamp |
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Answer» Correct Answer - A Agent Orange is weedicide with dioxin |
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| 464. |
Which one can absorb red and far-red light ?A. Carotene B. Xanthophyll C. Chlorophyll D. Phytochrome |
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Answer» Correct Answer - D Phytochrome can absorb red and far-red light |
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| 465. |
Which of the following induces flowering in short day plantA. AilxinB. Cytokinin C. Gibberellln D. Propylene |
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Answer» Correct Answer - B Cytokinin induces flowering in short-day plants. |
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| 466. |
In a plant subjected to continuous red light, phytochrome will showA. Increased synthesisB. Decreased levelC. Destruction D. Destruction and synthesis remain in balance |
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Answer» Correct Answer - D In a plant subjected to continuous red light, phytochrome will show destruction and synthesis remain in balance |
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| 467. |
Assertion: Agent orange is a micture of 2,4-D and 2,3,4-T , used during Vietnam war. Reason : 2,4-D and 2,4,5-T are used as herbicides.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 - B (b) The first selective herbicides to be discovered and used widely were 2,4-D and its derivatives. These compounds are very potent auxins. 2,4-D and 2,4,5-T destory dicts weeds. They block their seive elements and distory dicots weeds. They block their sevir elements and distube mitosis. The plant is ultimately destroyed. Agent orange,which was used in the war in Vietnam as a defoliant is an effective mixture of free 2,4-Dand the N-bytyl este of 2,4,5-T |
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| 468. |
F lorigen is produced in the region of A. Leaves B. Fruit C. Root D. Trunk |
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Answer» Correct Answer - A Florigen is produced in the region of leaves |
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| 469. |
a genetically dwarf plants can be converted into a tall plant by the useA. KinetinB. `GA_(3)`C. IAA`//`X-raysD. 2, 4-D |
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Answer» Correct Answer - b (b) GA is sprayed on these single gene dwarf plants, genetic dwarfism is overcome and plants become long e.eg maize,pea |
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| 470. |
Which one is short day plant ?A. Brassica campestrisB. Raphanus sativusC. Glycine maxD. Papaver sommférum |
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Answer» Correct Answer - C Glycine max (soyabean) is a short day plant |
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| 471. |
Maximum growth rate occur inA. Exponential phaseB. Stationary phaseC. Senescent phaseD. Lag phase |
| Answer» Correct Answer - A | |
| 472. |
Assertion : Gibberelins induce flowering in long day plants. Reason : Genetically tall plantbecome dwarf by application of Gibberellin.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 - C (c ) Application of GA can induce flowering in long day plants. It has no favourable effect on size of flower and fruit in certain plants. The genetically dwarf plants can be made tall by application of GA. |
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| 473. |
Maximum growth rate occur inA. Stationary phaseB. Senescent phaseC. lag phaseD. Exponential phase |
| Answer» Correct Answer - D | |
| 474. |
Gibberellin acid induce flowerA. In short day plants under long day conditionsB. In day neutral plants under dark conditionsC. In some gymnospermic plants onlyD. In long day plants under short day conditions |
| Answer» Correct Answer - D | |
| 475. |
Which is not a phytohorrnone? A. Phytochrome B. Florigen C. GA D. IAA |
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Answer» Correct Answer - A Phytochrome is not a phytohormone |
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| 476. |
Gibberellins promote the formation of `ul(A)`flowers on genetically `ul(B)` plants in Cannabis whereas ethylene promotes formation of `ul(C)` flowers on genetically `ul(D)` Cannabis plants.A. `{:(A,B,C,D),("male","female","female","male"):}`B. `{:(A,B,C,D),("male","male","female","female"):}`C. `{:(A,B,C,D),("female","male","male","female"):}`D. `{:(A,B,C,D),("female","female","male","male"):}` |
| Answer» Correct Answer - A | |
| 477. |
Who discovered Photoperiodism? A. Darwin B. Lysenko C. Amon D. Garner and Allard |
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Answer» Correct Answer - D Garner and Allard discovered photoperiodism |
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| 478. |
What is the chemical nature of gibberellin? |
| Answer» Correct Answer - Acidic. | |
| 479. |
First natural cytokinin was discovered byA. Skoog and Miller B. Latham C. Benson and CalvinD. Thimann and Went |
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Answer» Correct Answer - B First natural cytokinin was discovered by Lethum. |
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| 480. |
What si the effect of gibberellin on ripening of fruits? |
| Answer» It delays the ripening of fruits. | |
| 481. |
Gibberellins were first discoverded in fungal genusA. MucorB. RhizopusC. AgaricusD. Fusarium |
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Answer» Correct Answer - d GA ist discovweed from gibberella fujikuroi (fusarium moniliforme ) which is of ascomtcetous fungus |
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| 482. |
From where, the first natural cytokinin was isolated. |
| Answer» From unripe maize grains. | |
| 483. |
ABA acts antagonistic toA. EthyleneB. CytokininC. Gibberlic acidD. IAA |
| Answer» Correct Answer - c | |
| 484. |
ABA acts antagonistic toA. EthyleneB. CytokininC. Gibberelic acidD. IAA |
| Answer» Correct Answer - C | |
| 485. |
ABA acts antagonistic toA. NAA B. IBA C. IAA D. 6A3 |
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Answer» Correct Answer - D ABA acts as an antagoist to Gas. |
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| 486. |
ABA acts antagonistic toA. ethyleneB. cytokininC. gibberellic acidD. IA A |
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Answer» Correct Answer - c Abscisic acid is an antagonist to gibberellins as shown in the table given below: `|{:(" Abscisic acid"," Gibberellic acid"),("It inhibits growth","It promotes growth"),("It promotes the dormancy of seeds, buds and tubers","It overcomes the natural dormancy of seeds, tubers, etc"),("It inhibits the synthesis of RNA and proteins","It promotes the synthesis of RNA and Proteins"),("Causes abscission of flowers and fruits","Promotes development of fruits"),("Promotes leaf senescence","Prevents leaf senescence"),("Promotes stomatal closure","Promotes stomatal opening"),("Prevents amylase activity","Promotes amylase activity during seed germination."):}:|` |
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| 487. |
What is the effect of cytokinin on lateral shoot growth? |
| Answer» It stimulates the lateral shoot growth. | |
| 488. |
Who discovered that ripe organes emitted a volatile substance? |
| Answer» Correct Answer - Cousins | |
| 489. |
What is the effect of ethylene on abscission? |
| Answer» It accelerates abscission. | |
| 490. |
What is the role of abscisic acid on abscission? |
| Answer» It promotes abscission of flowers and fruits. | |
| 491. |
Which phytohormone functions as a plant growth inhibitor? |
| Answer» Abscisic acid (ABA). | |
| 492. |
Cut or excised leaves remain green for long if induced to root of dipped inA. Gibberellins B. Auxins C. Abscission D. Vemalisation |
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Answer» Correct Answer - B Cut or excised leaves remain green for long if induced to root or dipped in cytokinins |
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| 493. |
Hormone primarily concern with cell division isA. IAAB. NAAC. cytokinin/zeatinD. gibberellic acid |
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Answer» Correct Answer - C Cell division is by far the most characteristic property associated with cytoklnins, though cytokinin never acts alone, as in combination with auxins, cytokinins stimulate cell division even in non-meristematic tissues |
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| 494. |
An excised leaf does not turn yellow if it is induced to root this is attributed to sythesis in root of or Leaf aging is retared by Or The cut flowers and vegetable can be kept be fresh a long period by hios plant horemoneA. EthyleneB. CytokininsC. GibberellinsD. Auxins |
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Answer» Correct Answer - b Cytokinin prevents decolouration of chlorophyll studty under Richmond land effects. Cytokinin increase shelf life of vegetables and cut flowers and keep then fresh for longer time by preventing deterioration of protein chlorophyll. |
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| 495. |
Cut or excised leaves remain green for long if induced to root of dipped inA. gibberellinsB. cytokininsC. auxinsD. ethylene |
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Answer» Correct Answer - B In Richmond-Lang effect, cytokinin delays senescence of leaves. As cytokinin treated detached leaves rnmain green after a period of twenty days where as controlled leaves were completely yellow and drying at tips and margins It was concluded that cytokinin was able to postpone for a number of days the disappearance of chlorophyll and degradation of proteins that normally occur with the ageing process of leaves |
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| 496. |
Phytochrome is involved inA. phototropismB. photorespirationC. photoperiodismD. geotropism |
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Answer» Correct Answer - C Phytochrome is a chromoprotein (photosensitive pigment) that exists in two states,` P_r` (red) or` P_660` and Per (far red) or `P_730` Phytochrome is involved in photomorphogenetic responses, seed germination, bud dormancy, .synthesis of gibbernllin and ethylene and photoperiodism |
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| 497. |
The closing and opening of the leaves of Mimosa pudica is due toA. thermonastic movementB. hydrotropic movementC. seismonastic movementD. chemonastic movement |
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Answer» Correct Answer - C Seismonastic movements are nastic movements of turgor in response to stimulus of shock (like touch/mechanical/ electrical/thermal/ chemical shock). On touching Mimosa pudica, its leaves droop down and the stimulus travels at the speed of 1 cm/sec |
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| 498. |
Shock movements of leaves of Sensitive Plant, Mimosa pudica, areA. thermonastyB. seismonastyC. hydrotropismD. chemonasty |
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Answer» Correct Answer - B In seismonastic movement, response is made to mechanical shocks such as blows, shaking or pressure. In Mimosa, turuor changes occur in thin walled cells of pulvinus (lower side) and pulvinnules (upper side), causing folding of pinnules, drooping of compound leaves |
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| 499. |
Shock movements of leaves of Sensitive Plant, Mimosa pudica, areA. Thermonasty B. Seismonasty C. Hydrotropism D. Chemonasty |
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Answer» Correct Answer - B Shock movements of leaves of sensitive Plant, Mi- are seismonasty. |
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| 500. |
The closing and opening of the leaves of Mimosa pudica is due toA. Seismonastic movementB. Chemonastic movementC. Thermonastic movementD. Hydrotropic movement |
| Answer» Correct Answer - A | |