Gibberellic acid is a/an:-
1. lndole compound
2. Terpene
3. Adenine derivative
4. Carotenoid

Subtopic:  Gibberellin |
 82%
From NCERT
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The PGR used to initiate flowering and for synchronizing fruit-set in pineapples is:

1. Abscisic acid
2. Cytokinin
3. Auxin
4. Ethylene

Subtopic:  Ethylene |
 61%
From NCERT
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Cytokinin does not help in:

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

Subtopic:  Cytokinin |
 79%
From NCERT
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In most situations, which of the following acts as an antagonist to GAs?
1. ABA
2. IAA
3. Kinetin
4. Ethylene

Subtopic:  Abscisic Acid |
 88%
From NCERT
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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) |
 87%
From NCERT
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All the following plants are biennials except:-
1. Sugarbeet
2. Cabbages
3. Carrots
4. Wheat

Subtopic:  Vernalization (OLD NCERT) |
 88%
From NCERT
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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 |
 67%
From NCERT
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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 |
 94%
From NCERT
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Plant Growth Regulators (PGRs) are not
1. Very less in number in plants
2. Small and simple molecules
3. Diverse chemical composition
4. Plant hormones or phytohormones

Subtopic:  Growth Hormones & Auxin |
 59%
From NCERT
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N6- furfurylamino purine and kinetin are derivative of …….

(1) Indol compounds

(2) Adenine

(3) carotenoids

(4) Terpenes

Subtopic:  Cytokinin |
 83%
From NCERT
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