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Q. No.Delay of senescence or Richmond Lang effect is a physiological effect of
1. IAA
2. CK
3. GA
4. C2H4
Subtopic: Cytokinin |
64%
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CH2 = CH2 is mainly responsible for
1. Formation of internode
2. Formation of nodes
3. Ripening of fruits
4. Formation of roffette
1. Formation of internode
2. Formation of nodes
3. Ripening of fruits
4. Formation of roffette
Subtopic: Ethylene |
86%
From NCERT
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Gibberellin mediates amylase formation during germination of cereal grains is inhibited by
1. Abscisic acid
2. Ethylene
3. Gibberellins
4. Cytokinins
1. Abscisic acid
2. Ethylene
3. Gibberellins
4. Cytokinins
Subtopic: Gibberellin |
63%
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Select an incorrect match
| 1. | Tryptophan | – | Auxin |
| 2. | Methionine | – | Ethylene |
| 3. | tRNA | – | Cytokinin |
| 4. | Violaxanthin | – | GA3 |
Subtopic: Growth Hormones & Auxin |
54%
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Match the following
| Column I | Column II | ||
| a | Auxin | (i) | Root hair formation |
| b | Cytokinin | (ii) | Seed development |
| c | Ethylene | (iii) | Xylem differentiation |
| d | ABA | (iv) | Nutrient mobilisationn |
1. a(iv), b(ii), c(iii), d(i)
2. a(ii), b(iii), c(i), d(iv)
3. a(i), b(iii), c(ii), d(iv)
4. a(iii), b(iv), c(i), d(ii)
Subtopic: Growth Hormones & Auxin | Cytokinin | Ethylene | Abscisic Acid |
84%
From NCERT
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Which of the given events does not happen during seed germination?
1. Emergence of radicle
2. Increase in rate of respiration
3. Hydrolysis of stored polysaccharides and proteins
4. Photosynthesis by cotyledons
1. Emergence of radicle
2. Increase in rate of respiration
3. Hydrolysis of stored polysaccharides and proteins
4. Photosynthesis by cotyledons
Subtopic: Seed Dormancy (OLD NCERT) |
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Induction of \(\alpha \text {-amylase }\) activity in barley endosperm is a bioassay of
1. Auxin
2. GA3
3. Cytokinin
4. ABA
1. Auxin
2. GA3
3. Cytokinin
4. ABA
Subtopic: Growth Hormones & Auxin |
54%
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For flowering, the critical dark period should always be exceeded in
1. Long day plants
2. Short day plants
3. Day-neutral plants
4. All type of plants
1. Long day plants
2. Short day plants
3. Day-neutral plants
4. All type of plants
Subtopic: Photoperiodism (OLD NCERT) |
From NCERT
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Which of the following statements does not characterize photoperiodism?
1. Mediated by florigen hormone
2. Conversion of shoot apex into reproductive apex
3. Red light is stimulatory in SDP, LDP and DNP for flowering
4. Photoperiodic stimulus is perceived by mature leaf
1. Mediated by florigen hormone
2. Conversion of shoot apex into reproductive apex
3. Red light is stimulatory in SDP, LDP and DNP for flowering
4. Photoperiodic stimulus is perceived by mature leaf
Subtopic: Photoperiodism (OLD NCERT) |
54%
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Hypothetical 'florigen' could be produced prematurely in long-day plants by exposing it to
1. Shortening light period
2. Red light during night
3. Extending dark period
4. Far-red light
1. Shortening light period
2. Red light during night
3. Extending dark period
4. Far-red light
Subtopic: Photoperiodism (OLD NCERT) |
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