Q. No.Subtopic: Auxin Function |
96%
Level 1: 80%+
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Which of the following synthetic auxins is commonly used as a herbicide to selectively kill dicotyledonous weeds?
| 1. | Indole-3-acetic acid (IAA) |
| 2. | Naphthalene acetic acid (NAA) |
| 3. | 2,4-Dichaaalorophenoxyacetic acid (2,4-D) |
| 4. | Indole butyric acid (IBA) |
Subtopic: Growth Hormones & Auxin | Auxin Function |
95%
Level 1: 80%+
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The inhibition of lateral bud growth by the apical bud due to the production of auxins is known as:
1. Apical dominance
2. Phototropism
3. Vernalisation
4. Bolting
1. Apical dominance
2. Phototropism
3. Vernalisation
4. Bolting
Subtopic: Auxin Function |
95%
Level 1: 80%+
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Subtopic: Growth Hormones & Auxin | Auxin Function |
94%
Level 1: 80%+
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A synthetic _________ known as 2,4-D is used as a selective herbicide.
1. auxin
2. gibberellin
3. cytokinin
4. ethylene
1. auxin
2. gibberellin
3. cytokinin
4. ethylene
Subtopic: Auxin Function |
94%
Level 1: 80%+
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In most higher plants, the growing apical bud inhibits the growth of …….. or axillary buds, a phenomenon called………….
| 1. | Lateral, lateral Dominance |
| 2. | Lateral, Apical Dominance |
| 3. | Apical, Lateral Dominance |
| 4. | Apical, Apical Dominance |
Subtopic: Growth Hormones & Auxin | Auxin Function |
90%
Level 1: 80%+
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Match List I with List II
Choose the correct answer from the option given below:
| List I | List II |
| A. Indole Acetic Acid | I. Increase length of grapes stalks |
| B. Zeatin | II. Hastens fruit ripening in tomatoes |
| C. Gibberellic acid | III. Overcome apical dominance |
| D. Ethephon | IV. Rooting in stem cuttings |
Choose the correct answer from the option given below:
| 1. | A-II, B-I, C-IV, D-III |
| 2. | A-IV, B-II, C-I, D-III |
| 3. | A-IV, B-III, C-I, D-II |
| 4. | A-III, B-IV, C-II, D-I |
Subtopic: Auxin Function | Gibberellin | Ethylene |
89%
Level 1: 80%+
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Identify the option having correct match of hormones with their respective function
a. Apical dominance
b. Xylem differentiation
c. Increased malt yield
d. Delayed ripening
1. a and c – Cytokinin
2. b and c – Gibberellins
3. c and d – ABA
4. a and b – Auxin
Subtopic: Auxin Function |
87%
Level 1: 80%+
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Match the following
| Column I | Column II | ||
| a. | Auxin | (i) | Root hair formation |
| b. | Cytokinin | (ii) | Seed development |
| c. | Ethylene | (iii) | Xylem differentiation |
| d. | ABA | (iv) | Nutrient mobilisation |
| 1. | a(iv), b(ii), c(iii), d(i) |
| 2. | a(ii), b(iii), c(i), d(iv) |
| 3. | a(ii), b(iii), c(i), d(iv) |
| 4. | a(iii), b(iv), c(i), d(ii) |
Subtopic: Auxin Function | Cytokinin | Ethylene | Abscisic Acid |
86%
Level 1: 80%+
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What would be expected to happen if you cut the shoot tips of tea?
| 1. | Inhibition of lateral growth |
| 2. | Growth of lateral buds |
| 3. | Promotion of horizontal growth & male flowers |
| 4. | Inhibition of flowering |
Subtopic: Auxin Function |
83%
Level 1: 80%+
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