Consider the two statements:
Assertion (A):
Spraying sugarcane crop with gibberellins increases the yield by as much as 20 tonnes per acre.
Reason (R):
Spraying sugarcane crop with gibberellins increases the length of the stem.
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: Gibberellin |
91%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Statement I: | Kinetin occurs naturally in plants. |
| Statement II: | Zeatin does not occur naturally in plants. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Cytokinin |
75%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
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
1. Root apices
2. Developing shoot buds
3. Young fruits
4. Senescent organs
Subtopic: Cytokinin |
86%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
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%+
Please attempt this question first.
Hints
Please attempt this question first.
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%+
Please attempt this question first.
Hints
Please attempt this question first.
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%+
Please attempt this question first.
Hints
Please attempt this question first.
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%+
Please attempt this question first.
Hints
Please attempt this question first.
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%+
Please attempt this question first.
Hints
Please attempt this question first.
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%+
Please attempt this question first.
Hints
Please attempt this question first.
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%+
Please attempt this question first.
Hints
Please attempt this question first.
© 2025 GoodEd Technologies Pvt. Ltd.