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.
| 651. |
Dendrochonology isA. Sencondary growthB. Apical grwthC. Seasonal variationD. Determine of age of tree |
| Answer» Correct Answer - d | |
| 652. |
The exponential growth can be mathematically expressed asA. `L_(t) = L_(0) +rt`B. `W_(1) = W_(0) +e^(rt)`C. `W_(1) = W_(0) e^(rt)`D. `L_(t) = L_(0) - rt` |
| Answer» Correct Answer - C | |
| 653. |
Exponential growth occur inA. YeastB. Asexual reproductionC. BacterialD. All of these |
| Answer» Correct Answer - b | |
| 654. |
Exponential growth in plants can be expressed asA. `L_(t)=L_(0)+rt`B. `L_(e)=L_(t)rt`C. `W_(1)=W_(0)e^(rt)`D. `W_(1)=W_(0)ert` |
| Answer» Correct Answer - C | |
| 655. |
Exponential phase in growth is characterized byA. Enlargements of cellsB. Constant increase in growth rateC. Maturation of cellsD. Both (1) and (2) |
| Answer» Correct Answer - D | |
| 656. |
Short day plant isA. Xanthium B. Pisum C. Cucumis D. Avena |
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Answer» Correct Answer - A Xanthium is short day plant |
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| 657. |
Exponential growth occur inA. Yeast B. Bacteria C. Asexual reproductionD. All of the above |
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Answer» Correct Answer - D Exponential growth occurs in asexual reproduction and unicellular organisms like yeast and bacteria |
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| 658. |
Identify the following diagrammatic representation of types of growth and their mathematical expression. |
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Answer» Correct Answer - I=Arithmetic, `L_(t)=L_(0)+rt` II=Geometric `W_(1)=W_(0)e^(rt)` |
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| 659. |
Falling of floral parts, leaves and fruits from the mother plant is calledA. Senescence B. AbscissionC. Photoperiodism D. |
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Answer» Correct Answer - B Falling of floral parts, leaves and fruits from the mother plant is called abscission |
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| 660. |
Identify the labelled parts A,B and C in given figure: |
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Answer» Correct Answer - A-lag phase B-Log phase or exponential phase C-Stationary phase. |
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| 661. |
In the given figrue identify the group of plant. |
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Answer» Correct Answer - A-Long day plant B-Short day plant C-Day neutral plant |
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| 662. |
Which locomotory movement is not correctA. Cyclosis and rotation of cytoplasm in Hydrilla. B. Sucrose induced movement of sperms. C. Flagellar movement of slime mould. D. Chlamydomonas moves away from intense light. |
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Answer» Correct Answer - C Flagellar movement is not found in slime mould |
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| 663. |
Which one demonstrates process associated with abscission of a leafA. In the leaf concentration of both auxin and ABA decreases.B. In the leaf concentration of both auxin and ABA increases. C. Reduction in ABA concentration and increase of auxin concentration in the leaf. D. Reduction in concentration of auxin and increase of concentration ofABA in the leaf. |
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Answer» Correct Answer - D Reductuction in concentration of auxin and increase of concentrauon of ABA in the leaf dmnnonstratés process associated with abscxssina of a leaf. |
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| 664. |
Removal of auxin source demonstrates that leaf abscission is _______by auxin, and apical dominance is________by auxin.A. promoted, promotedB. inhibited, inhibitedC. promoted, inhibitedD. inhibited, promoted |
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Answer» Correct Answer - D Shedding of mature leaves from the stem or ripe furits from the stem is called abscission. Generally a layer of tissue is formed at the base of the organ. This layer of tissue is called abscission zone. Abscission zone does not occur when the concentration of auxin is high, particularly when the gradient of auxin is steep, i.e, more auxin on distal side and less auxin on proximal side. the abscission zone formation occus rapidly when the auxin gradient become slight or netural. Moreover, the plant hormone ethylene is found to promote the abscission. Thus, a high concentration of auxin prevents the formation of abscission layer and the phenomenon is controlled by the concentrations of auxin and ethylene. Apical dominance is promoted by auxin. |
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| 665. |
Which of the following statements does not characterize photoperiodism?A. Mediated by florigen hormoneB. Conversion of shoot apex into reproductive apexC. Red light is stimulatory in SDL, PDL and DNP for floweringD. Photoperiodism stimulus is perceived by mature leaf |
| Answer» Correct Answer - C | |
| 666. |
Which one o f the following plant hormone (phytomone ) Is know as a stress hormoneA. Abscisic acidB. EthyleneC. `GA_(3)`D. Indole acetic acid |
| Answer» Correct Answer - A | |
| 667. |
All given statements are correct w.r.t. photoperiodism, exceptA. Discovered by garner and allard in a variety of tobaccoB. Stimulus is received by young leavesC. Florigen is hypothetical hormone produced in response to stimulusD. Florigen is transported to bud through phloem |
| Answer» Correct Answer - B | |
| 668. |
Photoperiodism is substituted byA. TemperatureB. Mineral nutrientC. Vit.D. Iron |
| Answer» Correct Answer - a | |
| 669. |
Phytohormine commonly called stress hormone isA. AuxinB. Abscisic acidC. GibberellinD. Cytokinins |
| Answer» Correct Answer - B | |
| 670. |
Photoperiodism was first characterized inA. CottonB. TobaccoC. PotatoD. Tomato |
| Answer» Correct Answer - B | |
| 671. |
In some germinating seeds, enzymes mobillise nutrients in the cotyledons. Name the phytohormone that stimulates the production of such enzymes |
| Answer» Gibberellic acid is the phytohormone which induces production of hydrolytic enzymes in the endosperm of germinating seeds | |
| 672. |
Which of the following may be the substitute of photoperiodism?A. HumidityB. TemperatureC. Mineral nutrientsD. Soil moisture |
| Answer» Correct Answer - B | |
| 673. |
Phototropism affectsA. Vegetative growthB. Internode elongationC. Seed germinationD. Reproductive growth |
| Answer» Correct Answer - B | |
| 674. |
A phytohormone involved in the de novo synthesis of `alpha`-amylase in germinating seeds isA. AuxinB. GibberellinC. EthyleneD. Cytokinin |
| Answer» Correct Answer - B | |
| 675. |
A Pigment concerned with both floral induction and seed germination isA. FlorigenB. ChlorophyllC. PlastocyaninD. Phytochrome |
| Answer» Correct Answer - A | |
| 676. |
Apical dominance is not affectd byA. Indoleacetic acidB. GibberellinsC. IndoleacetaldehydeD. Indolebutyric acid |
| Answer» Correct Answer - D | |
| 677. |
The activity of `alpha`-amylase in the endosperm of a germinating seed of barley is induced byA. EthyleneB. CytokininC. IAAD. Gibberellin |
| Answer» Correct Answer - D | |
| 678. |
The activity of `alpha`-amylase in the endosperm of a germinating seed of barley is induced byA. ethyleneB. cytokininC. IA AD. gibberellin |
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Answer» Correct Answer - D Gibberellic acid induces de novo (a new) synthesis of various hydrolytic enzymes, such as, `alpha`-amylase, ribonuclease, `alpha`-1,3-glucanase and protease in aleurone cells of barley grains. This has been experimentally shown by isolating the aleurone layer and treating it with gibberellin solution. These enzymes are mobilised to endosperm during germination and hydrolyse the storage reserve. |
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| 679. |
Assertion: Strtification of seeds may promote their germination. Reason: stratification promote gibberellin and cytokinins.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) Stratification of seeds may affect the disappearance of inhibitors and the buildup of germination promoters such as the sibberellins and cytokinins. Natural stratification occurs when seeds shed in the fall are covered with cold soil, debris and snow. In artificial stratification, layers of seeds are alternated with layers of moistened Sphagnum sand or some other appropriate material are stored at low temperatures. |
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| 680. |
At the onset of speed germination ,the digestive enzymes amylase are produced by the action of Or The activity of `alpha` amylase in the endosperm of barley geminating seed is induced is induced byA. Cytokinin B. Gibberellins C. Ethylene D. Auxin |
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Answer» Correct Answer - B At the time of seed germination, digestive enzymes are induced to be formed under the influence of gib-berellins. |
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| 681. |
At the onset of speed germination ,the digestive enzymes amylase are produced by the action of Or The activity of `alpha` amylase in the endosperm of barley geminating seed is induced is induced byA. AuxinsB. GibberellinsC. CytokininsD. Ethylene |
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Answer» Correct Answer - b (d) GA Ist discovered from Gibberellla fujkuroi (Fusarium moniliforme) which is of ascomycetous fungus. |
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| 682. |
Gibberellin mediate amylase formation during germination of cereal grains is inhibited byA. Abscisic acidB. EthyleneC. GibberellinsD. Cytokinins |
| Answer» Correct Answer - A | |
| 683. |
Different kinds of structures develop in plants in different phase of growth or in response to enviornment. This ability is called_____. A. plasticityB. elasticityC. heterophyllyD. differentiation |
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Answer» Correct Answer - A Different structure develop in different phases of growth as well as in response to environement. The ability to chage under the influence of internal or external stimuli is called plasticity. |
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| 684. |
Plant hormones play a role in regulating seed germination. The graph shows changes in hormone concentrations (left axis) and hypocotyl growth (right axis) over time for moong bean. Which hormone(s) most likely regulates hypocotyl (bean sprout) growth during moong bean germination? A. Gibberellic acidB. AuxinC. Cytokinin aloneD. Both (a) and (b) |
| Answer» Correct Answer - d | |
| 685. |
Gibberellins can promote seed germination because of their influence onA. rate of cell division B. production of hydrolyzing enzymes C. synthesis of abscisic acid D. absorption of water through hard seed coat |
| Answer» Correct Answer - B | |
| 686. |
Gibberellins can promote seed germination because of their influence onA. rate of cell division B. production of hydrolysing enzymesC. synthesis of abscisic acid D. absorption of water through hard seed coat |
| Answer» Correct Answer - B | |
| 687. |
_________includes all the changes that an organism undergoes during its life cycle, from seed germination to senescence.A. Development B. Differentiation C. Plasticity D. Photoperiodism |
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Answer» Correct Answer - A All changes that an organism goes through during its life cycle from germination of the seed to senescence, is called development |
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| 688. |
_________includes all the changes that an organism undergoes during its life cycle, from seed germination to senescence.A. GrowthB. DifferntitationC. DedifferentitationD. Development |
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Answer» Correct Answer - D Development is the sequence of events that occur in the life histroy of a plant which includes seed germination, growth, differentiation, maturation, flowering, seed formation and senescence. The process of development is considered as the sum of growth and differentiation controlled by several intrinsic factors (including genetic and hormonal) and extrinsic factors (inculing light, temperature, water, oxygen, nutrients, etc). |
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| 689. |
Nicotiana sylvestris flowers only during long days and N.tobacum flower only during long days in the labortory undre different photoperiods , they can be induced to flower at the same time and can be cross fertized to flower aat the and can be corss fertillzed to produce self - fertile offsping .What is the best reason for considering N. syvestris and N . tobacum to be separate speciesA. They arae physioogically disnctB. They araea morphologically distinceC. they connot interbreed in natureD. They are reprductively distinct |
| Answer» Correct Answer - c | |
| 690. |
Go through the following matches (i) Cytokinis- Inhibits secondary cambial growth (ii) Ethylene - Prevents senescence (iii) Abscisic acid- Stops cambial activity (iv) Ethylene -Inuces seed & bud dormancy Which of these are correctA. (i)&(iii)B. (i),(iii)& (iv)C. (iii) & (iv)D. All are correct |
| Answer» Correct Answer - A | |
| 691. |
Plants normally flowering in winter remain vegetative in summer even if they are kept at winter temperature becauseA. Transpiration rate becomes very high during summerB. Laws of limiting factors are applicable in summerC. Pollination fails to take place in summerD. They do not get the required day length during summer |
| Answer» Correct Answer - D | |
| 692. |
Flash of light in dark inhibits flowering inA. SDPB. LDPC. IPD. DNP |
| Answer» Correct Answer - A | |
| 693. |
In SDP, flowering is interrupted ifA. dark condition is interrupted by white/ red lightB. dark condition is interrupted by far red lightC. dark condition is interrupted by red fol- lowed by far red lightD. in short day plant flowering can not be interrupted |
| Answer» Correct Answer - A | |
| 694. |
Low temperature required for vernalization is usually betweenA. `1^(º)-10^(º)C`B. `5-15^(º)C`C. `1-30^(º)C`D. `10 -3^(º)C` |
| Answer» Correct Answer - A | |
| 695. |
Which of the following is indispensable in all cultureA. Gibberellin `(GA_3)`B. CytokininC. EthyleneD. ABA |
| Answer» Correct Answer - B | |
| 696. |
Low temperature treatment to speed up the process of flowering is referred to asA. VernallzatlonB. CryobiologyC. PhotoperiodismD. Pruning |
| Answer» Correct Answer - A | |
| 697. |
The stimulus of cold treatment (vernalisation) is perceived byA. fruitsB. shoot apexC. axillary budsD. flowers |
| Answer» Correct Answer - B | |
| 698. |
A hormone which can substitute effect of cold treatment and photoperiodism to bring early flowering isA. ethyleneB. gibberellinC. cytokininD. florigen |
| Answer» Correct Answer - B | |
| 699. |
If night period is broken by a single flash of red light, followed by far red, red and finally far red light, what will be its effect on flowering in short day plantsA. no floweringB. poor floweringC. delayed floweringD. no effect on flowering in SDP |
| Answer» Correct Answer - D | |
| 700. |
Climacteric fruit is the one which showsA. autochoryB. persistent flower partsC. high respiratory rate and ethylene at rip- eningD. both (2) and (3) |
| Answer» Correct Answer - C | |