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1.4 Photosynthesis

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Question 24

A student measures the rate of photosynthesis of pondweed at different light intensities. The temperature is kept the same.

The Figure shows the results.

Figure

Use the Figure to give the rate of photosynthesis at a light intensity of 3 arbitrary units.

[1]

Describe the pattern shown in the Figure.

[2]

Calculate how many times greater the rate of photosynthesis is at a light intensity of 4 arbitrary units than at a light intensity of 1 arbitrary unit.

[1]

Explain why the rate of photosynthesis increases as the light intensity increases from 0 to 6 arbitrary units.

[2]

Markscheme

1.4 Photosynthesis Questions

GCSE
Biology
1.4 Photosynthesis

117 exam-style questions on OCR GCSE Biology 1.4 Photosynthesis, covering 1.4.1 Photosynthesisers as biomass producers, 1.4.2 Factors affecting the rate of photosynthesis, and 1.4.3 Limiting factors in photosynthesis. Each one has a worked solution and a mark scheme showing where the marks go.

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