- 1(current)
Q. No.Identify the incorrectly matched pair:
| Scientist | PGR discovery | |
| 1. | Cousins | Ethylene |
| 2. | Kurosawa | Gibberellin |
| 3. | Skoog and Miller | ABA |
| 4. | F. W. Went | Auxin |
Subtopic: Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
82%
Level 1: 80%+
Hints
Identify the correct statements:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | Auxins, gibberellins and cytokinins are plant growth promoters. |
| II: | ABA is an inhibitor of plant growth activities. |
| III: | Ethylene is largely a plant growth promoter. |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
77%
Level 2: 60%+
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During mid-1960s, three independent researches reported the purification and chemical characterisation of three different kinds of inhibitors: inhibitor-B, abscission II and dormin. Later all the three were proved to be chemically identical. It was named:
1. Indole-3-acetic acid
2. N6-furfurylamino purine
3. Abscisic acid
4. Gibberellic acid
1. Indole-3-acetic acid
2. N6-furfurylamino purine
3. Abscisic acid
4. Gibberellic acid
Subtopic: Abscisic Acid |
93%
Level 1: 80%+
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Which of the following is not a function of ethylene?
| 1. | Breaking seed and bud dormancy |
| 2. | Horizontal growth of seedlings, swelling of axis and apical hook formation in dicot seedlings |
| 3. | Enhancement of respiration rate during ripening of fruits |
| 4. | Closure of stomata during water stress |
Subtopic: Ethylene | Abscisic Acid |
84%
Level 1: 80%+
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Abscisic acid:
| I: | acts as a general plant growth inhibitor and an inhibitor of plant metabolism. |
| II: | inhibits seed germination. |
| III: | stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses. |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: Abscisic Acid |
90%
Level 1: 80%+
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Which PGR stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stress?
| 1. | Cytokinin | 2. | Giberrellin |
| 3. | ABA | 4. | Ethylene |
Subtopic: Abscisic Acid |
90%
Level 1: 80%+
Hints
Consider the two statements:
| Assertion (A): | ABA is also called the stress hormone. |
| Reason (R): | ABA plays an important role in seed development, maturation and dormancy. |
| 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: Abscisic Acid |
67%
Level 2: 60%+
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In most situations, which PGR acts as an antagonist to GAs?
| 1. | ABA | 2. | Ethylene |
| 3. | Cytokinin | 4. | Giberrellin |
Subtopic: Gibberellin | Abscisic Acid |
83%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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