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 |
81%
Level 1: 80%+
Hints
Identify the plant growth regulator that, though is largely an inhibitor but, can be placed in both plant growth promoter and plant growth inhibitor groups?
| 1. | Auxins | 2. | Gibberellins |
| 3. | Ethylene | 4. | Abscisic acid |
Subtopic: Ethylene |
83%
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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Which gaseous PGR is synthesised in large amounts by tissues undergoing senescence and ripening fruits
| 1. | ABA | 2. | IAA |
| 3. | Ethylene | 4. | GA |
Subtopic: Ethylene |
93%
Level 1: 80%+
Hints
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 |
83%
Level 1: 80%+
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How many statements regarding Ethylene are true?
1. 0
2. 1
3. 2
4. 3
| I: | It is synthesised in large amounts by tissues undergoing senescence and ripening fruits. |
| II: | It promotes senescence and abscission of plant organs especially of leaves and flowers. |
| III: | It enhances the respiration rate during ripening of the fruits. |
2. 1
3. 2
4. 3
Subtopic: Ethylene |
81%
Level 1: 80%+
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Normally, when the seeds are mature, ethylene production increases and builds-up within the fruit, resulting in a climactic event that means:
| 1. | A sudden spurt of growth | 2. | Leaf expansion |
| 3. | Rise in respiratory rate | 4. | Death of radicle |
Subtopic: Ethylene |
84%
Level 1: 80%+
Hints
The documented effects of ethylene on plants include all the following, except:
| 1. | It breaks seed and bud dormancy |
| 2. | It initiates germination in peanut seeds |
| 3. | It does not allow sprouting of potato tubers |
| 4. | It promotes root growth and root hair formation. |
Subtopic: Ethylene |
82%
Level 1: 80%+
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All the following are physiological functions of Ethylene in plants except:
| 1. | It breaks seed and bud dormancy |
| 2. | It delays germination in peanut seeds |
| 3. | It leads to sprouting of potato tubers |
| 4. | It promotes rapid internode/petiole elongation in deep water rice plants |
Subtopic: Ethylene |
74%
Level 2: 60%+
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Which plant growth regulator (PGR) promotes root growth and root hair formation, thus helping the plants increase their absorption surface?
1. Auxins
2. Gibberellins
3. Ethylene
4. Kinetins
1. Auxins
2. Gibberellins
3. Ethylene
4. Kinetins
Subtopic: Ethylene |
70%
Level 2: 60%+
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