Q. No.E. Kurosawa
| 1. | Reported the appearance of symptoms of the disease in rice seedlings |
| 2. | In 1926 |
| 3. | Used sterile filtrates of the fungus |
| 4. | All of these |
Subtopic: Gibberellin |
96%
Level 1: 80%+
Hints
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 |
95%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Gibberellic acid, which was the first gibberellin to be structurally characterized, is:
| 1. | GA1 | 2. | GA2 |
| 3. | GA3 | 4. | GA4 |
Subtopic: Gibberellin |
95%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which process describes the elongation of internodes in rosette plants, enabling them to form a tall floral axis, often influenced by gibberellins?
| 1. | Vernalisation | 2. | Bolting |
| 3. | Photoperiodism | 4. | Thigmotropism |
Subtopic: Gibberellin |
94%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following is not correct about Gibberellins?
| 1. | Another kind of promotors PGR |
| 2. | There are more than 100 Gibberellins |
| 3. | Found in Fungi and higher plants |
| 4. | The first and most intensively studied form of Gibberellins is GA2 |
Subtopic: Gibberellin |
95%
Level 1: 80%+
Hints
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.
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
Match the following columns and select the correct option.
| A. | IAA | i. | Herring sperm DNA |
| B. | ABA | ii. | Bolting |
| C. | Ethylene | iii. | Stomatal closure |
| D. | GA | iv. | Weed-free lawns |
| E. | Cytokinin | v. | Ripening of fruits |
| 1. | A-iv, B-iii, C-v, D-ii, E-i |
| 2. | A-v, B-iii, C-iv, D-ii, E-i |
| 3. | A-iv, B-i, C-v, D-iii, E-ii |
| 4. | A-v, B-iii, C-ii, D-i, E-iv |
Subtopic: Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
93%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Gibberellins increase sugarcane yield by:
| 1. | Stimulating chlorophyll production, leading to higher photosynthesis. |
| 2. | Directly converting starch into sucrose in the leaves. |
| 3. | Accelerating root growth, leading to increased water absorption. |
| 4. | Increasing stem length, thus enhancing the storage of sugars. |
Subtopic: Gibberellin |
93%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Spraying sugarcane crop with gibberellins increases the length of the stem and increase the length by
| 1. | 20 tonnes per Km |
| 2. | 20 tonnes per acre |
| 3. | 40 tonnes per acre |
| 4. | 40 tonnes per Km |
Subtopic: Gibberellin |
93%
Level 1: 80%+
Hints
© 2026 GoodEd Technologies Pvt. Ltd.