Q. No.The discovery of gibberellins was linked to the study of which disease in rice seedlings?
| 1. | Blight |
| 2. | Rust |
| 3. | Bakanae or foolish seedling disease |
| 4. | Wilt disease |
Subtopic: Growth Hormones & Auxin |
97%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Subtopic: Growth Hormones & Auxin |
97%
Level 1: 80%+
Hints
Giberellin is synthesized from
| 1. | Giberella fujikori |
| 2. | Clavicepes pupura |
| 3. | Ascherosonia aleyroides |
| 4. | Aspergillus midulans |
Subtopic: Growth Hormones & Auxin |
96%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
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 |
94%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Match the hormone with its physiological effect:
Codes:
1. A-4, B-3, C-2, D-1
2. A-1, B-2, C-4, D-3
3. A-3, B-4, C-1, D-2
4. A-2, B-1, C-3, D-4
| List-I (Hormone) |
List-II (Effect) |
||
| A. | Auxin | 1. | Delay senescence |
| B. | Cytokinin | 2. | Apical dominance |
| C. | Gibberellin | 3. | Bolting |
| D. | Abscisic acid | 4. | Dormancy |
1. A-4, B-3, C-2, D-1
2. A-1, B-2, C-4, D-3
3. A-3, B-4, C-1, D-2
4. A-2, B-1, C-3, D-4
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin | Abscisic Acid |
90%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Subtopic: Growth Hormones & Auxin |
94%
Level 1: 80%+
Hints
Subtopic: Growth Hormones & Auxin | Auxin Function |
91%
Level 1: 80%+
Hints
Match the following plant growth regulators with their chemical nature:
| Column I | Column II | ||
| A | Auxins | i | Indone compounds |
| B | Gibberellins | ii | Acidic growth hormone |
| C | Ethylene | iii | Gaseous hormone |
| D | Cytokinins | iv | Adenine derivatives |
| 1. | A-i, B-ii, C-iii, D-iv |
| 2. | A-iii, B-iv, C-ii, D-i |
| 3. | A-i, B-iii, C-iv, D-ii |
| 4. | A-iv, B-i, C-iii, D-ii |
Subtopic: Growth Hormones & Auxin |
92%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Match each item in Column-I with one in Column-II and select the correct match from the codes given:
Codes:
| Column-I [PGR] |
Column-II [Scientist] |
||
| A. | Auxin | P. | E. Kurosawa |
| B. | Cytokinin | Q. | F. W. Went |
| C. | Gibberellin | R. | H. H. Cousins |
| D. | Ethylene | S. | Skoog and Miller |
| A | B | C | D | |
| 1. | S | Q | R | P |
| 2. | Q | S | P | R |
| 3. | P | R | S | Q |
| 4. | R | P | Q | S |
Subtopic: Growth Hormones & Auxin | Gibberellin | Cytokinin |
94%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Plant growth regulator's
| 1. | May act synergistically or antogonistically |
| 2. | Are intrinsic intercellular factor |
| 3. | Are simple, molecules of diverse chemical composition |
| 4. | All of the above |
Subtopic: Growth Hormones & Auxin |
97%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
© 2026 GoodEd Technologies Pvt. Ltd.