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Science · 2024 · 3 marks
CBSE 2024 · Region 5 · Set 3 · Q29
Name a plant growth hormone synthesized at the shoot tip. Explain its effect on the growth of a plant in response to light.
Name a plant growth hormone synthesized at the shoot tip. Explain its effect on the growth of a plant in response to light.
Marking-scheme solution
Auxin
When light is coming from one side of the plant, auxin located at shoot tip diffuses towards the shaded side of the shoot.
Concentration of auxin in the shaded region stimulates the cells to grow longer as compared to the region exposed to light. So the plant tends to bend towards the light.
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.