The phenomenon which is influenced by auxin and also played a major role in its discovery is:
1. Phototropism
2. Root initiation
3. Gravitropism
4. Apical Dominance
Subtopic:  Growth Hormones & Auxin | Photoperiodism (OLD NCERT) |
 62%
From NCERT
NEET - 2023
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Removal of apical dominance by decapitation is utilised for: 
1. Suppressing the activity of intercalary meristem 
2. Early senescence 
3. Hedge making 
4. Preparing weed-free lawns 

Subtopic:  Growth Hormones & Auxin | Auxin Function |
 79%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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Which of the following growth regulators is an adenine derivative ?
1.Auxin2.Cytokinin
3.Ethylene4.Abscisic acid
Subtopic:  Growth Hormones & Auxin |
 73%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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Who coined the term 'Kinetin'?

1. Skoog and Miller

2. Darwin

3. Went

4. Kurosawa

Subtopic:  Growth Hormones & Auxin |
 83%
From NCERT
NEET - 2020
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Match the following concerning the activity/function and the phytohormone involved:

Column I Column II
(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:

Options: (a) (b) (c) (d)
1. (ii) (iii) (iv) (i)
2. (iii) (iv) (ii) (i)
3. (iv) (iii) (ii) (i)
4. (iv) (ii) (i) (iii)

Subtopic:  Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
 85%
From NCERT
NEET - 2020
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NEET 2023 - Target Batch - Aryan Raj Singh
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Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because:

1. Gibberellins prevent bolting and are inactivated.
2. Auxins prevent leaf drop at early stages.
3. Effect of auxins is removed and the growth of lateral buds is enhanced.
4. Gibberellins delay the senescence of leaves.

Subtopic:  Growth Hormones & Auxin | Auxin Function |
 82%
From NCERT
NEET - 2019
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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 |
 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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One of the synthetic auxin is:

1. NAA

2. IAA

3. GA

4. IBA

Subtopic:  Growth Hormones & Auxin | Auxin Function |
 84%
From NCERT
AIPMT - 2009
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NEET 2023 - Target Batch - Aryan Raj Singh
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