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Q. No.Natural cytokinins are synthesised in all the following regions in a plant except:
1. Root apices
2. Developing shoot buds
3. Young fruits
4. Senescent organs
Subtopic: Cytokinin |
86%
Level 1: 80%+
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Ethylene enhances the respiration rate during ripening of the fruits. This rise in rate of respiration is called:
1. respiratory climactic.
2. utilisation coefficient.
3. respiratory hyperpnea.
4. oxygen debt.
1. respiratory climactic.
2. utilisation coefficient.
3. respiratory hyperpnea.
4. oxygen debt.
Subtopic: Ethylene |
95%
Level 1: 80%+
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Ethylene:
1. Only I is correct
2. Only II is correct
3. Both I and II are incorrect
4. Both I and II are correct
| I: | is used to initiate flowering and for synchronising fruit-set in pineapples. |
| II: | induces flowering in mangoes. |
1. Only I is correct
2. Only II is correct
3. Both I and II are incorrect
4. Both I and II are correct
Subtopic: Ethylene |
81%
Level 1: 80%+
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Consider the two statements:
| Assertion (A): | The most widely used compound as source of ethylene is ethephon. |
| Reason (R): | Ethephon in an aqueous solution is readily absorbed and transported within the plant and releases ethylene slowly. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False. |
| 4. | (A) is False; (R) is True. |
Subtopic: Ethylene |
82%
Level 1: 80%+
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Seed germination is inhibited by ABA in antagonism with:
1. Auxins
2. Ethylene
3. Kinetins
4. GAs
1. Auxins
2. Ethylene
3. Kinetins
4. GAs
Subtopic: Gibberellin | Abscisic Acid |
85%
Level 1: 80%+
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Match List I with List II
Choose the correct answer from the options given below:
| List I | List II | ||
| A. | IAA | I. | Bolting |
| B. | ABA | II. | Ripening of Fruits |
| C. | GA | III. | Weed Free Lawns |
| D. | Ethylene | IV. | Stomatal Closure |
Choose the correct answer from the options given below:
| 1. | A ‐ IV , B ‐ III , C ‐ II , D ‐ I |
| 2. | A ‐ III , B ‐ IV , C ‐ I , D ‐ II |
| 3. | A ‐ IV , B ‐ III , C ‐ I , D ‐ II |
| 4. | A ‐ III , B ‐ IV , C ‐ II , D ‐ I |
Subtopic: Auxin Function | Gibberellin | Ethylene | Abscisic Acid |
83%
Level 1: 80%+
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Cytokinins help
| 1. | To retain chlorophyll |
| 2. | In promoting cell division |
| 3. | In overcoming apical dominance |
| 4. | More than one option is correct |
Subtopic: Cytokinin |
76%
Level 2: 60%+
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Which of the following phytohormones is responsible for ripening of fruits and increasing the number of female flowers in cucumbers?
| 1. | Auxin | 2. | Ethylene |
| 3. | Gibberellin | 4. | Cytokinin |
Subtopic: Ethylene |
92%
Level 1: 80%+
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Deposition of new materials inside the cell wall of cells starts in
1. Meristematic phase
2. Reproductive phase
3. Maturation phase
4. Elongation phase
1. Meristematic phase
2. Reproductive phase
3. Maturation phase
4. Elongation phase
Subtopic: Growth |
57%
Level 3: 35%-60%
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Which phase of a sigmoid curve explains the initial phase of growth when growth rate is very slow?
1. Log phase
2. Lag phase
3. stationary phase
4. Maturation phase
1. Log phase
2. Lag phase
3. stationary phase
4. Maturation phase
Subtopic: Growth | Growth Model |
81%
Level 1: 80%+
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