Cytokinin does not help in:

1. Lateral shoot growth
2. Overcoming apical dominance
3. Adventitious shoot formation
4. Promoting leaf senescence

Subtopic:  Cytokinin |
 71%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

In most situations, which of the following acts as an antagonist to GAs?
1. ABA
2. IAA
3. Kinetin
4. Ethylene

Subtopic:  Abscisic Acid |
 81%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following is the site for perception of light/dark in plants?
1. Root apex
2. Shoot apex
3. Leaves
4. Flower

Subtopic:  Photoperiodism (OLD NCERT) |
 80%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

A flash of red light followed by a flash of far-red light given during the middle of the night to a short-day plant will likely 
1. cause increased flower production.
2. have no effect upon flowering.
3. inhibit flowering.
4. stimulate flowering.

Subtopic:  Photoperiodism (OLD NCERT) |
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Which of the following statements about plant hormones is false?

1. The growth of plants in nature is probably regulated by a combination of growth-stimulating and growth-inhibiting hormones.

2. Abscisic acid generally promotes growth.

3. Gibberellins stimulate cell enlargement.

4. Cytokinins promote cell division.

Subtopic:  Gibberellin |
 84%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

At the root apex the cells of the meristematic region are not characterized by:-

1. Being rich in protoplasm
2. Abundant plasmodesmatal connections
3. A cell wall that is primary in nature
4. Having small inconspicuous nuclei

Subtopic:  Growth |
 75%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

All the following plants are biennials except:-
1. Sugarbeet
2. Cabbages
3. Carrots
4. Wheat

Subtopic:  Vernalization (OLD NCERT) |
 82%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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Identify the option where all the columns are not correctly matched:

 

PGR

Nature

Actions

1.

Auxin

Indole compounds

Apical dominance, Flowering in pineapples, Parthenocarpy in tomatoes

2.

Cytokinin

Adenine derivative

 

Cell division, Adventitious shoot formation, Delay in leaf senescene

3.

Gibberellin

Terpene

Increase in length

4 .

ABA

Carotenoid derivative

Closure of stomata in water stress, inducing seed dormancy, inducing flowering in mango

 

Subtopic:  Abscisic Acid |
 62%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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The PGR used to induce parthenocarpy in tomatoes is:-

1. Auxin
2. Gibberellin
3. Cytokinin
4. ABA

Subtopic:  Growth Hormones & Auxin |
 89%
From NCERT
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Primary and secondary growth are inhibited by:

1. Auxins

2. Gibberellins

3. Abscisic acid

4. Cytokinins

Subtopic:  Abscisic Acid |
 78%
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NEET 2023 - Target Batch - Aryan Raj Singh
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