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 |
 77%
From NCERT
AIPMT - 2010
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Root development is promoted by:
1. Auxin
2. Gibberellin
3. Ethylene
4. Abscisic acid

Subtopic:  Growth Hormones & Auxin |
 76%
From NCERT
AIPMT - 2010
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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 |
 86%
From NCERT
AIPMT - 2012
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Vernalisation stimulates flowering in:
1. Turmeric
2. Carrot
3. Ginger
4. Zaminkand

Subtopic:  Vernalization (OLD NCERT) |
 77%
From NCERT
AIPMT - 2012
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What is necessary for ripening of fruits:
1.  80% of ethylene
2.  Abscisic acid
3.  2, 4 D
4.  A.M.O. – 16

Subtopic:  Ethylene |
 95%
From NCERT
AIPMT - 1998
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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 (OLD NCERT) |
 89%
From NCERT
AIPMT - 1998
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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 |
 90%
From NCERT
AIPMT - 2004
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Cell elongation in internodal regions of the green plants takes place due to:

 
1. Cytokinins 2. Gibberellins
3. Ethylene 4. Indole acetic acid 
Subtopic:  Gibberellin |
 71%
From NCERT
AIPMT - 2004
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If the apical bud has been removed then we observe:

1. More lateral branches

2. More axillary buds

3. Plant growth stops

4. Flowering stops

Subtopic:  Auxin Function |
 78%
From NCERT
AIPMT - 2000
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Which hormone is responsible for fruit ripening:

1. Ethylene

2. Auxin

3. Ethyl chloride

4. Cytokinin

Subtopic:  Ethylene |
 95%
From NCERT
AIPMT - 2000
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