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O-LevelBiologyCoordination & Response5090/11 · May/June 2025 · Q301 Mark

Why do plant shoots grow towards light?

AAuxin inhibits cell elongation on one side.
BThey grow more rapidly on the lighter side.
CMore auxin accumulates on the darker side.
DAuxin stimulates cell division.

✓ Correct answer

C: More auxin accumulates on the darker side.

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About this question

Topic
Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2025 Paper 1 Variant 1, question 30.

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