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4.1 Photosynthesis

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Question 19
F

A variegated plant has leaves with green areas and white areas. The white areas contain no chlorophyll. The plant has been kept in bright light for six hours. The figure shows one of its leaves.

Figure: A variegated leaf, showing the green area that contains chlorophyll and the white area that does not

image

a.

Explain why photosynthesis does not take place in the white area of the leaf.

[2]
b.

Carbon dioxide and water reach the white area of the leaf as well as the green area.

Use the idea that photosynthesis is endothermic to explain why this is still not enough for photosynthesis to take place in the white area.

[2]
c.

A variegated plant grows more slowly than a plant of the same species with all green leaves. Suggest why.

[2]
Markscheme

4.1 Photosynthesis Questions

  1. GCSE
  2. /Biology
  3. /4.1 Photosynthesis

68 exam-style questions on AQA GCSE Biology 4.1 Photosynthesis, covering 4.1.1 Photosynthetic reaction, 4.1.2 Rate of photosynthesis, and 4.1.3 Uses of glucose from photosynthesis. Each one has a worked solution and a mark scheme showing where the marks go.

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