Ethylene:
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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__________ curve is obtained for cells in culture.
1. J-shaped
2. Linear
3. V-shaped
4. S-shaped
1. J-shaped
2. Linear
3. V-shaped
4. S-shaped
Subtopic: Growth | Growth Model |
72%
Level 2: 60%+
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A Leaf of 20 cm2 grows 5 cm2 per hour and B Leaf of 25 cm2 grows 5 cm2 per hour
The relative growth rate of leaf A and B respectively is
1. 25% and 20%
2. 20% and 25%
3. 50% and 100%
4. 25% and 50%
The relative growth rate of leaf A and B respectively is
1. 25% and 20%
2. 20% and 25%
3. 50% and 100%
4. 25% and 50%
Subtopic: Growth | Growth Model |
67%
Level 2: 60%+
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