"Foolish seedling" disease of rice led to the discovery of:

1. GA

2. ABA

3. 2, 4-D

4. IAA

Subtopic:  Gibberellin |
 89%
Level 1: 80%+
AIPMT - 2007
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Cell elongation in internodal regions of the green plants takes place due to:

 
1. Cytokinins 2. Gibberellins
3. Ethylene 4. Indole acetic acid 
Subtopic:  Gibberellin |
 72%
Level 2: 60%+
AIPMT - 2004
Hints

Parthenocarpic tomato fruits can be produced by:

1. removing androecium of flowers before pollen grains are released
2. treating the plants with low concentrations of gibberellic acid and auxins
3. raising the plants from vernalised seeds
4. treating the plants with phenylmercuric acetate

Subtopic:  Auxin Function | Gibberellin |
 66%
Level 2: 60%+
AIPMT - 2006
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Which one of the following pairs is not correctly matched?

1. Abscisic acid - Stomatal closure
2. Gibberellic acid - Leaves fall
3. Cytokinin - Cell division
4. IAA - Cell wall elongation
Subtopic:  Gibberellin |
 74%
Level 2: 60%+
AIPMT - 2007
Hints

Match the Following:

Column I

Column II

A. IAA

B. ABA

C. Ethylene

D. GA

E. Cytokinin

1. Herring sperm DNA.

2. Bolting

3. Stomatal closure

4. Weed-free lawns

5. Ripening of fruits.

Codes
 

Options:  A   B   C   D   E 
1. 4 3 5 2 1
2. 5 3 4 2 1
3. 4 1 4 3 2
4. 5 3 2 4

 

Subtopic:  Auxin Function | Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
 93%
Level 1: 80%+
Hints

To increase sugar production in sugarcanes, they are sprayed with

1. IAA

2. cytokinin

3. gibberellin

4. ethylene

Subtopic:  Gibberellin |
 95%
Level 1: 80%+
Hints

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Spraying sugarcane crop with which of the following plant growth regulators, increases the length of the stem, thus, increasing the yield?
1. Gibberellin  2. Cytokinin 
3. Abscisic acid  4. Auxin
Subtopic:  Gibberellin |
 84%
Level 1: 80%+
NEET - 2024
Hints

Match List-I with List-II 
List-I List-II
A. Ethylene I. Increase length of stem
B. Cytokinins II. Promotion of senescence and abscission
C. ABA III. Delaying leaf senescence
D. Gibberellins IV. Inhibition of seed germination 
Choose the correct answer from the options given below:
1. A-III, B-I, C-IV, D-II
2. A-II, B-III, C-IV, D-I
3. A-IV, B-II, C-I, D-III
4. A-III, B-IV, C-I, D-II
Subtopic:  Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
 88%
Level 1: 80%+
NEET - 2024
Hints

Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?
1. Abscisic Acid
2. Indole-3-butyric Acid
3. Gibberellic Acid
4. Zeatin
Subtopic:  Gibberellin |
 80%
Level 1: 80%+
NEET - 2023
Hints

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Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.

1. Gibberellin

2. Ethylene

3. Abscisic acid

4. Cytokinin

Subtopic:  Gibberellin |
 89%
Level 1: 80%+
NEET - 2020
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