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Q. No.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
Subtopic: Growth Hormones & Auxin |
83%
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Subtopic: Ethylene |
92%
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
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 |
81%
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
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 |
77%
From NCERT
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Match the following (Column I with Column II)
1. a(ii), b(i), c(iii), d(iv)
2. a(ii), b(i), c(iv), d(iii)
3. a(iv), b(ii), c(iii), d(iv)
4. a(i), b(ii), c(iii), d(iv)
| Column I | Column II | ||
| a | Ethephon | (i) | GA |
| b | Terpene | (ii) | Ethylene |
| c | Zeath | (iii) | Natural auxin |
| d | IAA | (iv) | Cytokinin |
2. a(ii), b(i), c(iv), d(iii)
3. a(iv), b(ii), c(iii), d(iv)
4. a(i), b(ii), c(iii), d(iv)
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin |
86%
From NCERT
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Match the following (Column I with Column II)
1. a(iii), b(ii), c(iv), d(i)
2. a(iv), b(i), c(iii), d(ii)
3. a(iv), b(i), c(ii), d(iii)
4. a(iv), b(ii), c(iii), d(i)
| Column I | Column II | ||
| a | Weedicide | (i) | GA3 |
| b | Bolting | (ii) | Cytokinin |
| c | Thinning of cotton | (iii) | Ethylene |
| d | Lateral shoot growth | (iv) | 2,4-D |
2. a(iv), b(i), c(iii), d(ii)
3. a(iv), b(i), c(ii), d(iii)
4. a(iv), b(ii), c(iii), d(i)
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin | Ethylene |
78%
From NCERT
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Dormancy of seeds is broken by ethylene whereas it is induced by
1. Abscisic acid
2. Auxin
3. Cytokinin
4. Gibberellic acid
1. Abscisic acid
2. Auxin
3. Cytokinin
4. Gibberellic acid
Subtopic: Ethylene | Abscisic Acid |
78%
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The plant hormone which closes the stomata in stressful conditions is
1. Cytokinin
2. Ga
3. Auxin
4. ABA
1. Cytokinin
2. Ga
3. Auxin
4. ABA
Subtopic: Abscisic Acid |
93%
From NCERT
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Both ethylene and ABA are responsible for
1. Promoting the abscission of leaves and fruits
2. Inducing dormancy of seeds
3. Stimulation of apical dominance
4. Ripening
1. Promoting the abscission of leaves and fruits
2. Inducing dormancy of seeds
3. Stimulation of apical dominance
4. Ripening
Subtopic: Ethylene | Abscisic Acid |
64%
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