Chemistry NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 6 PCB Single Correct MCQ
Published on: August 13, 2026

What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows?

A
Green plants seek light because they are phototrophic
B
Green plant need light to perform photosynthesis
C
Auxin accumulates on the shaded side, stimulating greater cell elongation there
D
Light stimulates plant cells on the lighted side to grow faster

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The correct answer is:
C

Auxin is responsible for the bending of plant towards the source of light. Auxin accumulate on the shaded side, stimulating greater cell elongation there.This means that the shaded side grows longer, causing the shoot to bend towards the light.

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