Which one of the following growth regulators is known as the stress hormone?

1. Abscisic acid

2. Ethylene

3. GA3

4. Indole acetic acid

Subtopic:  Abscisic Acid |
 94%
From NCERT
AIPMT - 2014
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One of the synthetic auxin is:

1. NAA

2. IAA

3. GA

4. IBA

Subtopic:  Growth Hormones & Auxin | Auxin Function |
 84%
From NCERT
AIPMT - 2009
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Which one of the following acids is a derivative of carotenoids?

1. Indole-butyric acid

2. Indole-3-acetic acid

3. Gibberellic acid

4. Abscisic acid

Subtopic:  Abscisic Acid |
 71%
From NCERT
AIPMT - 2009
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"Foolish seedling" disease of rice led to the discovery of:

1. GA

2. ABA

3. 2, 4-D

4. IAA

Subtopic:  Gibberellin |
 89%
From NCERT
AIPMT - 2007
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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%
From NCERT
AIPMT - 2007
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It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

1. Cytokinin and Abscisic acid

2. Auxin and Ethylene

3. Gibberellin and Cytokinin

4. Gibberellin and Abscisic acid

Subtopic:  Auxin Function | Ethylene |
 79%
From NCERT
NEET - 2019
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What is the site of perception of photoperiod necessary for induction of flowering in plants?

1. Leaves

2. Lateral buds

3. Pulvinus

4. Shoot apex

Subtopic:  Photoperiodism (OLD NCERT) |
 85%
From NCERT
NEET - 2019
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The typical growth curve in plants is:

1. sigmoid
2. linear
3. stair-steps shaped
4. parabolic
Subtopic:  Growth Model |
 87%
From NCERT
NEET - 2015
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Fruit and leaf drop at early stages can be prevented by the application of:

1. Ethylene

2. Auxins

3. Gibberellic acid

4. Cytokinins

Subtopic:  Auxin Function |
 69%
From NCERT
NEET - 2017
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You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

1.  IAA and gibberellin

2.  Auxin and cytokinin

3.  Auxin and abscisic acid

4.  Gibberellin & abscisic acid

Subtopic:  Auxin Function | Cytokinin |
 84%
From NCERT
NEET - 2016
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