ABA acts antagonistic to

Ethylene

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Cytokinin

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Gibberellic acid

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IAA

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Solution

The correct option is D
Gibberellic acid

Abscisic acid is an antagonist to gibberellins as shown in the table given below:
Abscisic acid Gibberellic acid
It inhibits growth. It promotes growth.
It promotes the dormancy of seeds, buds, and tubers. It overcomes the natural dormancy of seeds, tubers, etc.
It inhibits the synthesis of RNA and proteins. It promotes the synthesis of RNA and Proteins.
Causes abscission of flowers and fruits. Promotes the development of fruits.
Promotes leaf senescence. Prevents leaf senescence.
Promotes stomata! closure. Promotes stomatal opening.
Prevents amylase activity. Promotes amylase activity during seed germination.

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Question 10:

ABA acts as antagonistic to
(a) ethylene
(b) cytokinin
(c) gibberellic acid
(d) IAA

Which hormone acts antagonistically to gibberellins?

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Abscisic acid	Gibberellic acid
It inhibits growth.	It promotes growth.
It promotes the dormancy of seeds, buds, and tubers.	It overcomes the natural dormancy of seeds, tubers, etc.
It inhibits the synthesis of RNA and proteins.	It promotes the synthesis of RNA and Proteins.
Causes abscission of flowers and fruits.	Promotes the development of fruits.
Promotes leaf senescence.	Prevents leaf senescence.
Promotes stomata! closure.	Promotes stomatal opening.
Prevents amylase activity.	Promotes amylase activity during seed germination.