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Q. No.Which phytohormone promotes falling of old leaves whereas inhibits falling of young leaves?
1. ABA
2. Cytokinin
3. GA
4. Auxin
4. Auxin
Subtopic: Growth Hormones & Auxin | Auxin Function |
84%
From NCERT
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Which auxins are used in diluted form to produce parthenocarpic fruits?
1. IAA and lBA
2. 2, 4-D and lBA
3. NAA and GA
4. 2, 4-D cmd lAA
1. IAA and lBA
2. 2, 4-D and lBA
3. NAA and GA
4. 2, 4-D cmd lAA
Subtopic: Growth Hormones & Auxin | Auxin Function |
64%
From NCERT
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Subtopic: Growth Hormones & Auxin | Auxin Function |
91%
From NCERT
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Which of the following is not a function of gibberellic acid?
1. Bolting
2. Delayed senescence
3. Seed germination
4. Ripening
1. Bolting
2. Delayed senescence
3. Seed germination
4. Ripening
Subtopic: Gibberellin | Ethylene |
83%
From NCERT
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Apical dominance is stimulated by auxin whereas it is inhibited by
1. Ethylene
2. ABA
3. Gibberellic acid
4. Cytokinin
1. Ethylene
2. ABA
3. Gibberellic acid
4. Cytokinin
Subtopic: Growth Hormones & Auxin | Cytokinin |
79%
From NCERT
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Phytohormones responsible for cell division in callus are _____ and _____
1. ABA and cytokinin
2. Gibberellin and ethylene
3. Auxin and cytokinin
4. Ethylene and cytokinin
1. ABA and cytokinin
2. Gibberellin and ethylene
3. Auxin and cytokinin
4. Ethylene and cytokinin
Subtopic: Growth Hormones & Auxin |
82%
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Subtopic: Ethylene |
93%
From NCERT
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Which of the following is incorrect about ethylene?
| 1. | Promotes root hair formation |
| 2. | It is natural and derivative of carotenoids |
| 3. | It increases the number of female flowers |
| 4. | It causes synchronisation of flowering and fruit set in pineapples |
Subtopic: Growth Hormones & Auxin | Ethylene |
82%
From NCERT
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Select the correct match
| 1. | GA3 | - Early seed production in conifers. |
| 2. | Cytokinin | - Synchronise fruit set in pineapples. |
| 3. | Auxin | - Overcomes senescence. |
| 4. | Ethylene | - seed maturation and development |
Subtopic: Gibberellin |
72%
From NCERT
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Which of the following phytohormones is a derivative of carotenoids?
1. Auxin
2. ABA
3. Ethylene
4. Cytokinin
1. Auxin
2. ABA
3. Ethylene
4. Cytokinin
Subtopic: Growth Hormones & Auxin |
78%
From NCERT
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