Pruning of plants promotes branching because the auxillary buds get sensitized to:-

1. ethylene

2. gibberellin

3. cytokinin

4. indole acetic acid

Subtopic:  Growth Hormones & Auxin |
 58%
AIIMS - 2004
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NEET 2023 - Target Batch - Aryan Raj Singh
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Phytohormones are?
(1) hormones regulating growth from seed to adulthood

(2) growth regulators synthesised by plants and influencing physiological process

(3) hormones regulating flowering

(4) hormones regulating secondary growth

Subtopic:  Growth Hormones & Auxin |
 68%
AIIMS - 2008
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NEET 2023 - Target Batch - Aryan Raj Singh
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Refer the given figures on photoperiodism and select the correct option.


Subtopic:  Photoperiodism (OLD NCERT) |
 88%
From NCERT
AIIMS - 2010
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Abscisic acid is known as the stress hormone because it

(1) breaks seed dormancy

(2) induces flowering

(3) promotes leaf fall

(4) promotes closure of stomata

Subtopic:  Abscisic Acid |
 79%
From NCERT
AIIMS - 2012
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following plant growth regulators (PGRs) promotes root initiation, flowering and
induced parthenocarpy?

(1) Gibberellin

(2) Auxin

(3) Cytokinin

(4) Ethylene

Subtopic:  Growth Hormones & Auxin |
 85%
From NCERT
AIIMS - 2013
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Vernalisation is subjected to plants growing in ?
(1) tropical

(2) sub tropical areas

(3) temperate areas

(4) hot region/arctic region

Subtopic:  Vernalization (OLD NCERT) |
 53%
AIIMS - 2014
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Gibberellins can promote seed germination because of their influence on

(1) rate of cell division

(2) production of hydrolyzing enzymes

(3) synthesis of abscisic acid

(4) absorption of water through hard seed coat

Subtopic:  Gibberellin |
 53%
AIIMS - 2015
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NEET 2023 - Target Batch - Aryan Raj Singh
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One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third hormone increases the tolerance of plants to various stresses.They are respectively:-

(1) Gibberellin, Auxin, Ethylene

(2) Auxin, Gibberellin, Cytokinin

(3) Gibberellin, Auxin, ABA

(4) Auxin, Gibberellin, ABA

Subtopic:  Growth Hormones & Auxin | Gibberellin | Abscisic Acid |
 79%
From NCERT
AIIMS - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Identify the incorrect statement about ABA growth regulator.

1. It increases the tolerance of plants against different stresses.
2. It acts as general plant growth inhibitor and inhibitor of metabolism.
3. It helps in seed maturation and dormancy.
4. It promotes morphogenesis and differentiation of shoots.

Subtopic:  Abscisic Acid |
 75%
From NCERT
AIIMS - 2017
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following plant growth hormone increase the yield of sugar by increasing the length of stem in sugarcane?
(1) Cytokinin

(2) Ethylene

(3) Gibberellic acid

(4) Auxin

Subtopic:  Gibberellin |
 90%
From NCERT
AIIMS - 2017
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh