Question
How does auxin exert its effect on plant cells?
A. Acts directly on the cell wall, causing expansion
B. Binds to a receptor resulting in expression of genes
C. Causes the vacuole to absorb water and expand the cell
D. Causes the cell to undergo cell division
▶️Answer/Explanation
Ans:B
Question
How does auxin contribute to phototropism?
A. It increases production of light-sensitive proteins.
B. It increases growth of cells on the shaded side of the stem.
C. It inhibits growth of axillary buds.
D. It inhibits stem elongation.
▶️Answer/Explanation
Ans:B
Question
The diagram shows a plant shoot and the direction of the light which the shoot received.
What are the direction of movement and the effect of auxin in the tip of a plant shoot when receiving light from one side?
▶️Answer/Explanation
Ans:C