The growth of a root elongating at a constant rate will be represented by:

1. A only

2. B only

3. Both A and B

4. Neither A nor B

Subtopic:  Growth |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

Fruit and leaf drop at early stages can be prevented by the application of 
1. Cytokinins
2. ethylene
3. auxins
4. gibberellic acid 

Subtopic:  Growth Hormones & Auxin |
 72%
From NCERT
NEET - 2017
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

One of the synthetic auxin is 

1. NAA

2. IAA

3. GA

4. IBA

Subtopic:  Growth Hormones & Auxin |
 83%
From NCERT
NEET - 2009
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

advertisementadvertisement

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 |
 79%
From NCERT
NEET - 2009
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

Vernalization is the process of

1. flower induction by high temperature treatment

2. inhabitation of flowering by low temperature treatment

3. flower induction by light treatment

4. acceleration of the ability of a plant to produce flowers by chilling treatment

 54%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

Bud dormancy is induced by:-

1. ABA

2. ethylene

3. IAA

4. gibberellic acid.

Subtopic:  Abscisic Acid |
 72%
From NCERT
AIIMS - 2002
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

advertisementadvertisement

Refer the given figures on photoperiodism and select the correct option.


 86%
From NCERT
AIIMS - 2010
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

Abscisic acid is known as the stress hormone because it

1. breaks seed dormancy
2. induces flowering
3. promotes leaf fall
4. promotes closure of stomata

Subtopic:  Abscisic Acid |
 80%
From NCERT
AIIMS - 2012
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

Identify the incorrect statement about ABA growth regulator.

1. It increases the tolerance of plants against different stresses.
2. It acts as general plant growth inhibitor and inhibitor of metabolism.
3. It helps in seed maturation and dormancy.
4. It promotes morphogenesis and differentiation of shoots.

Subtopic:  Abscisic Acid |
 76%
From NCERT
AIIMS - 2017
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital

advertisementadvertisement

In the process of apical dominance, lateral buds are unable to grow in the presence of apical bud. This is due to:-

1. less amount of cytokinins in lateral buds
2. more amount of cytokinins in lateral buds
3. less amount of auxin in lateral buds
4. more amount of auxin in lateral buds


 

Subtopic:  Growth Hormones & Auxin | Auxin Function |
AIIMS - 2016
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital