O-LevelBiologyPlant Nutrition5090/11 · May/June 2017 · Q71 Mark

Which graph shows the effect of temperature on the rate of photosynthesis?

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AGraph showing photosynthesis rate increasing then sharply decreasing after an optimum temperature.

BGraph showing photosynthesis rate increasing to a plateau with increasing temperature.

CGraph showing photosynthesis rate decreasing, then increasing with temperature.

DGraph showing photosynthesis rate increasing to an optimum then sharply decreasing with temperature.

✓ Correct answer

D: Graph showing photosynthesis rate increasing to an optimum then sharply decreasing with temperature.

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Topic: Plant Nutrition, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2017 Paper 1 Variant 1, question 7.

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