MCQ on Abscisic Acid (ABA)




Abscisic acid (ABA) is a plant hormone nicknamed the “stress hormone.” It helps plants cope with drought, cold, and other threats by triggering responses like closing pores to conserve water and promoting seed dormancy. This is an MCQ on Abscisic Acid Structure and Functions.

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1. 
What is the primary physiological effect of abscisic acid (ABA) in plants?

2. 
Where is abscisic acid primarily synthesized in plants?

3. 
What is the main role of abscisic acid (ABA) in plant growth and development?

4. 
Which of the following is a physiological effect of abscisic acid (ABA) in response to drought stress?

5. 
Which hormone often works antagonistically with abscisic acid (ABA) to regulate plant growth and development?

6. 
How does abscisic acid (ABA) regulate stomatal closure in plants?

7. 
Which of the following is NOT a physiological effect of abscisic acid (ABA)?

8. 
What is the primary role of abscisic acid (ABA) in inducing dormancy in seeds?

9. 
Which of the following is a mechanism by which abscisic acid (ABA) regulates gene expression?

10. 
Which plant response involves the movement of abscisic acid (ABA) towards the lower side of the stem, resulting in curvature away from light?

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MCQ on Abscisic Acid

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