- 1(current)
Q. No.Match the following concerning the activity/function and the phytohormone involved:-
| (a) | Fruit ripener | (i) | Abscisic acid |
| (b) | Herbicide | (ii) | GA 3 |
| (c) | Bolting agent | (iii) | 2, 4-D |
| (d) | Stress hormone | (iv) | Ethephon |
Select the correct option from following:-
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iv) | (ii) | (i) | (iii) |
Subtopic: Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
93%
Level 1: 80%+
Hints
Influences of ethylene on dicot plants include:
1. Only I and II
2. Only III
3. Only II and III
4. I, II and III
| I: | vertical growth of seedlings |
| II: | thinning of the axis |
| III: | apical hook formation |
2. Only III
3. Only II and III
4. I, II and III
Subtopic: Ethylene |
53%
Level 3: 35%-60%
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Which of the following is not a function of the plant growth hormone ethylene?
| 1. | It induces flowering in mango. |
| 2. | It retards abscission of flowers and fruits in cotton, cherry, and walnut. |
| 3. | It hastens fruit ripening in tomatoes and apples. |
| 4. | It promotes female flowers in cucumbers. |
Subtopic: Ethylene |
72%
Level 2: 60%+
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Ethylene:
1. I, II and III are correct
2. Only II
3. I and II are correct
4. Neither I nor II
| I: | is highly effective in fruit ripening. |
| II: | breaks seed and bud dormancy. |
| III: | promotes root growth and root hair formation |
2. Only II
3. I and II are correct
4. Neither I nor II
Subtopic: Ethylene |
81%
Level 1: 80%+
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How many of the following statements regarding plant growth regulators (PGRs) are correct?
1. One
2. Two
3. Three
4. Four
| I: | Auxins promote cell elongation and root growth in plants. |
| II: | Gibberellins are responsible for seed germination and stem elongation. |
| III: | Cytokinins inhibit apical dominance and promote lateral bud growth. |
| IV: | Ethylene stimulates fruit ripening and senescence in plants. |
2. Two
3. Three
4. Four
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin | Ethylene |
70%
Level 2: 60%+
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Match the following plant hormones with their primary functions:
| Column I | Column II | ||
| 1 | Cytokinins | A | Stimulates fruit ripening |
| 2 | Abscisic acid | B | Inhibits shoot growth and promotes seed dormancy |
| 3 | Ethylene | C | Promotes cell division in plant tissues |
| 4 | Gibberellins | D | Stimulates growth and elongation of stems and leaves |
| 1. | 1-C, 2-B, 3-D, 4-A |
| 2. | 1-D, 2-C, 3-B, 4-A |
| 3. | 1-B, 2-D, 3-C, 4-A |
| 4. | 1-C, 2-B, 3-A, 4-D |
Subtopic: Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
93%
Level 1: 80%+
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Which of the following are functions of ethylene in plants?
| I: | Fruit ripening |
| II: | Closure of stomata in water stress |
| III: | Internode/petiole elongation in deep water rice plants. |
| IV: | Root growth and root hair formation. |
| 1. | Only I, II and III |
| 2. | Only I, III and IV |
| 3. | Only II, III and IV |
| 4. | I, II, III and IV |
Subtopic: Ethylene |
87%
Level 1: 80%+
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- 1(current)
Q. No.
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