Match the following concerning the activity/function and the phytohormone involved :-

(a) Fruit ripener         (i) Abscisic acid

(b) Herbicide             (ii) GA 3

(c) Bolting agent       (iii) 2, 4-D

(d) Stress hormone   (iv) Ethephon

Select the correct option from following :-

1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

2. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

4. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

Subtopic:  Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
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Vernalisation stimulates flowering in -
1. Turmeric
2. Carrot
3. Ginger
4. Zaminkand

Subtopic:  Vernalization |
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Which one of the following generally acts as an antagonist to gibberellins ?
1.  Ethylene
2.  ABA
3.  IAA
4.  Zeatin

Subtopic:  Abscisic Acid |
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One of the commonly used plant growth hormone in tea plantations is -

1. Abscisic acid

2. Zeatin

3. Indole-3- acetic acid

4. Ethylene

Subtopic:  Growth Hormones & Auxin |
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Root development is promoted by -
1. Auxin
2. Gibberellin
3. Ethylene
4. Abscisic acid

Subtopic:  Growth Hormones & Auxin |
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Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:
1. Gibberellic acid
2. Nitrate
3. Ascorbic acid
4. Chilling conditions

Subtopic:  Seed Dormancy |
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Who coined the term 'Kinetin'?

1. Skoog and Miller

2. Darwin

3. Went

4. Kurosawa

Subtopic:  Cytokinin |
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What is necessary for ripening of fruits :
1.  80% of ethylene
2.  Abscissic acid
3.  2, 4 D
4.  A.M.O. – 16

Subtopic:  Ethylene |
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Effect of light and dark rhythm on plants is known as:
1.  Photonasty
2.  Phototropism
3.  Photoperiodism
4.  Photomorphogenesis

Subtopic:  Photoperiodism |
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The maximum growth rate occurs in:-

1. Senescent phase

2. Lag phase

3. Exponential phase

4. Stationary phase 

Subtopic:  Growth Model |
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