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.
| 251. |
Phytochrome was isolated byA. Butler et alB. W. Went C. R. HillD. Borthwick et al |
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Answer» Correct Answer - A Phytochrome was isolated by Butler et al. |
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| 252. |
Which one is not correctly matched ?A. Cytokinin-celldivisionB. IAA-cellwallelongationC. Abscisic acid-stomatal closureD. Gibberellic acid--1eaf fall |
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Answer» Correct Answer - D ABA-Leaf fall |
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| 253. |
Name the hormone which stimulates trans- verse or isodiametric growthA. ethyleneB. GAC. sodium salt of NAAD. methionine |
| Answer» Correct Answer - A | |
| 254. |
The first natural cytokinin of plants isA. zeatinB. kinetinC. dihydrooxyzeatinD. riboxylzeatin |
| Answer» Correct Answer - A | |
| 255. |
The first cytokinin was isolated byA. DarwinB. EvinsC. Miller and SkoogD. Leopoid |
| Answer» Correct Answer - C | |
| 256. |
The effect of IAA on the synthesis of ethylene is that itA. is reducedB. is inducedC. in unaffectedD. depends upon the presence of other hormones |
| Answer» Correct Answer - B | |
| 257. |
Storage sprouting of potato can be prevented byA. Maleic hydrazide B. Gibberellins C. Indole acetic acid D. Cytokinins |
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Answer» Correct Answer - A Sproutin can be prevented M storage by malcic hydrazidc |
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| 258. |
How will you induce lateral branching in a plant which normally does not produce them ? Give reason in support of your answer. |
| Answer» Lateral branching is induced by removing the apical bud in plants. It is because the apical bud inhibits the growth of lateral buds due to apical dominance. It has been shown that the auxin synthesized in the apical bud inhibits growth of lateral bud. On removing the apical bud the influence of auxin is destroyed and the next axial bud grows out rapidly. | |
| 259. |
Phenomenon of photoperidodism was first discovered by ______in the "Maryland mammoth" variety of____________A. Garner and Allard, tobaccoB. Went, tobaccoC. Garner and Allard, cockleburD. Knott, cocklebur |
| Answer» Correct Answer - A | |
| 260. |
Hormone which helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation. |
| Answer» Correct Answer - Cytokinin | |
| 261. |
Plants which must be exposed to light for a period less than the critical duration before the howering is initiated in then are calledA. Short day plants B. Long day plants C. Day neutral plants D. Short long day plants |
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Answer» Correct Answer - A Plants which must be exposed to light for a period less than the critical duration before the Howering is initiated in then are called short day plants |
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| 262. |
Plants which require the exposure to light for a period exceeding a well defined critical duration for howering are called A. Short day plants B. Long day plants C. Day neutral plants D. Short long day plants |
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Answer» Correct Answer - B Plants which require the exposure to light for a period exceeding a well defined critical duration for flowering are called long day plants. |
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| 263. |
the term "photoperiodism" was proposed by or the phenomenon of photoperiodism in plants was discovered byA. Lysenko and ThimmanB. Blackman and SkoogC. Garner and AlardD. Chailakhyan and Borthwick |
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Answer» Correct Answer - c (c ) The effect of photoperiod on flowering was discovered by Garners and Allard at USA in 1920 in case of maryland mammoth variety of Tabacco which is an SDP. |
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| 264. |
Arifical ripening of fruits is caused by the treatment ofA. I A AB. N A AC. ethyleneD. Kinetin |
| Answer» Correct Answer - C | |
| 265. |
In SDP flowering does not occurA. When intermediates light is given red`to`far red`to`redB. Interupted by a flash of far lightC. interrupted by a flash red`to`far lightD. all of these |
| Answer» Correct Answer - a | |
| 266. |
Which of the following for the phytochromeA. Phytochrome is a phytohormoneB. Phytochrome is a photosynthetic pigmentC. Phytochrome is a pigment that controls growth, photomorphogenisis and development and development of many plantsD. Phytochrome is a regularatory protien that controls several dark-dependant developmental plants |
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Answer» Correct Answer - c (c ) Phytochrome is pigment which regulates growth and development like, photoperiodism, chloroplast development, leaf abscission and senescence etc. |
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| 267. |
Cell elogation in iternodal region takes plaace due toA. GibberellinsB. EthyleneC. CytokininsD. Indole acetic acid |
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Answer» Correct Answer - a (a) The gibberellins induce elongation of the internodes The eleongation of stem results to rpid cell division and cell elongation induced by gibberellins. |
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| 268. |
Seasonality of plants is due toA. Phototropism B. Photosynthesis C. Photopenodism D. Photolysis |
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Answer» Correct Answer - C Seasonality of plants is due to photoperiodism |
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| 269. |
Herbicides are chemicals which controlA. InsectsB. FungiC. WeedsD. Nematodas |
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Answer» Correct Answer - C Herbicides are chemicals which controlled weeds. |
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| 270. |
Agent orange isA. Biodegradable insecticideB. Dioxin weedicideC. BiofertilizerD. Biopesticide |
| Answer» Correct Answer - B | |
| 271. |
What will be the effect on photochrome in a plant subjected to continous subjected to continous red lightA. Level of Phytochrome will decreaseB. Phytochrome will be destroyedC. Phytochrome synthesis will increaseD. None of these |
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Answer» Correct Answer - d (d) If photochrome `P_(660)` is exposed to red light,it changes to `P_(730)` and if `P_(730)` is exposed to far-red light, it changes quickely back to `P_(660)` because both are in interconvertible form. |
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| 272. |
Which one among the following chemical is wued for causing defoliation of for causing defoliation of forest treesA. Phosphon B. Maleic hydrazideC. AMO 1618 D. 2,4-D |
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Answer» Correct Answer - D Which one is used for defoliation of forest trees 2,4-D. |
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| 273. |
Which one among the following chemical is wued for causing defoliation of for causing defoliation of forest treesA. Amo-1618B. Phosphon-DC. Maleic hydrazideD. 2, 4-D |
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Answer» Correct Answer - d ( d) 2 ,4 dichorophenory acetic acid is used as a defoliant for board leaved plants . |
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| 274. |
Which of the following is a coconut mik factorA. AuxinB. CytokininC. MorphactionD. None of the above |
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Answer» Correct Answer - b In liquid endosperm of coconut kinetin are present |
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| 275. |
Ethylene is connected withA. Aerobic respirationB. Climacteric respirationC. Anaerobic respiration D. Fermentation |
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Answer» Correct Answer - B Ethylene is connected with climacteric respiration. |
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| 276. |
Ethylene is connected withA. Aerobic respirationB. Climacteric respirationC. Anaerobic respirationD. Fermentation |
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Answer» Correct Answer - B Ethylene is connected with climacteric respiration. |
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| 277. |
Assertion: Secondary roots and shoots are plagiogeotropic. Reason: Plagiogeotropic roots are those which develop at an angle of `45^(@)` from the vertical axis.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) Secondary roots and shoot are plagiofeotropic that is, theygrow to a positionat an oblique angle `(45^(@)`)to the gravitational force. Root and stem brenches lie at an angle other than `90^(@)` to the direaction of gravity. |
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| 278. |
Cyokinins are formed inA. RootsB. LeavesC. FruitsD. Stems |
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Answer» Correct Answer - a Cytokinin concentration ar ehighest in meristematic regfions and area of continuous growth such as root, young leaves, developing fruits and seed. |
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| 279. |
The site of preception of light on plants for flowering isA. StemsB. RootC. LeavesD. Fruits |
| Answer» Correct Answer - C | |
| 280. |
Cytokinin is horimone whose main function isA. Induction of cell division and delary in sences anceB. To take part in cell divisionC. Rafers to cel movementsD. to cause dormancy |
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Answer» Correct Answer - a (a) the cytokinn is a true cell divison facor, promotees meristematic tissue regions. Yhe cytokinin prevents distruction of chlorophyll In leaves. In presence of kinn the rate of mitotic cell divison gets increased. Under this effect when grass leaves are kept in cytokinin solution then they become green for the long time. So this effect of cytokinin is called as Richmond-Lang effect of senescence. |
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| 281. |
Which hormone is used to induce ripening in banana?A. CytokininB. EthyleneC. ABAD. `GA_(3)` |
| Answer» Correct Answer - B | |
| 282. |
Cucumber and tomato are the examples ofA. Day neutral plantsB. Short day plantsC. Long day plantsD. Long short day plants |
| Answer» Correct Answer - A | |
| 283. |
Ageing of leaves and shoots is calledA. ChlorosisB. Wilting C. Senescence D. Necrosis |
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Answer» Correct Answer - C Ageing of leaves and shoots is called senescence |
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| 284. |
Among `GA_(1), GA_(2) "and" GA_(3)` which one is throughly studied form? |
| Answer» Correct Answer - `GA_(3)` | |
| 285. |
Name the synthetic form of cytokinin. |
| Answer» Correct Answer - Kinetic | |
| 286. |
Richmond Lang effect can be oberved in plants by the treatment ofA. CytokininB. EthyleneC. Abscisic acidD. Gibberellins |
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Answer» Correct Answer - a Cytokinins delay the senscence of leaves and other organ by controlling protein synthesis and molbilization. Reported by "Richmond and Land" in 1957 working on "Xianthium leaves" |
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| 287. |
Richmond-Lang effect is shown byA. AuxinsB. SugarsC. ZeatinD. Gibberellin |
| Answer» Correct Answer - C | |
| 288. |
Which among the following is a synthesis plant hormone?A. IAAB. GAC. 2, 4-DD. ABA |
| Answer» Correct Answer - C | |
| 289. |
Most of the winter flowering plants belong toA. Short long day plantsB. Long day plantsC. Short day plantD. Day neutral plant |
| Answer» Correct Answer - C | |
| 290. |
Which phytohormone is used to increase the size of the apple? |
| Answer» Correct Answer - Gibberellin | |
| 291. |
It is known that some varieties of wheat are sown in autumn but are harvested around next mid summer ltbvrgt A.what could be the probable reason for this ? B. what term is used for this promotion of lowering under low temperature? C. which palnt hormone can replace the cold treatment? |
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Answer» (a) a winter season comes before flowering. Which is required for initiating of flowering. (b) Vernalisation. (c) Vernalin plant hormone can replace vernalisation. |
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| 292. |
A substance which is used to stimulate the increase in size of the apple fruit isA. MorphactinB. PromalinC. EthyleneD. Ethapone |
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Answer» Correct Answer - B (b) Promolin is a mixture of cytokinin-6-benzalderine , `GB_(4)` and `GA_(7)`. It is very active in stimulating increase in apple size particularly in red delicious apples. |
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| 293. |
Which of the following plant material is widely used in the preparation of culture mediumA. Pinus longifoliaB. Cocos nuciferaC. Borassus flabelliferD. Cycas revoluta |
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Answer» Correct Answer - B (b) Because liquid endosperm of Cocos nucifera possesses kinetin (cytokinin) growth hormone which is responsible for rapid cell division in culture medium. |
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| 294. |
The period between spring and summer is favourable toA. short long day plantsB. long short day plantsC. day neutral plantsD. amphiphotoperiodic plants |
| Answer» Correct Answer - A | |
| 295. |
Sugarcane isA. amphiphotoperiodic plantB. intermediate plantC. day neutral plantD. short day plant |
| Answer» Correct Answer - D | |
| 296. |
The period between summer and autumn is favourable toA. short long day plantsB. long short day plantsC. day neutral plantsD. amphiphotoperiodic plants |
| Answer» Correct Answer - B | |
| 297. |
Growth in internodal regions of green plants is due toA. EthyleneB. Indole acetic acidC. CytokininD. Gibberellins |
| Answer» Correct Answer - D | |
| 298. |
Phytochrome is responsible forA. FloweringB. Seed germinationC. TranspirationD. Both 1 & 2 |
| Answer» Correct Answer - D | |
| 299. |
What is meant by vivapary in plants?A. Seed germination with subterranean cotyledonsB. Seed germination with epiterranean cotyledonsC. Fruit development without pollinationD. Seed germination inside fruit, while the fruit is still attached to plant |
| Answer» Correct Answer - D | |
| 300. |
Vivparous type of speed germination is found inA. SonneratiaB. RhizophoraC. Oryza sativaD. Both 1 & 2 |
| Answer» Correct Answer - D | |