MCQ on Auxin (Plant Hormone)







Auxins are plant growth regulators that act like tiny conductors. They control cell elongation, root formation, and even tell plants which way to grow by influencing their response to light and gravity. This is an MCQ on Auxin Hormone – Structure, Functions and Physiological Effects.

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1. 
Which of the following is a primary physiological effect of auxins in plants?

2. 
Where are auxins primarily synthesized in plants?

3. 
What is the main role of auxins in phototropism?

4. 
Which of the following is a commercial application of auxins in agriculture?

5. 
Which hormone often works antagonistically to auxins in regulating plant growth and development?

6. 
How do auxins promote cell elongation in plants?

7. 
Which of the following is NOT a physiological effect of auxins?

8. 
What is the primary role of auxins in apical dominance?

9. 
Which of the following is a mechanism by which auxins regulate gene expression?

10. 
Which plant response involves the movement of auxins towards the lower side of the stem, resulting in curvature towards light?

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mcq on auxin

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