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Exam-style practice

Photosynthesis answer explanations

Review worked answers and explanations for Photosynthesis. Aligned to Cambridge IGCSE Biology.

Answer explanations

Question 21 of 22

Review the answer support, then move sideways through the set.

Paper 4 structured question: Photosynthesis

Paper 4Theory (Extended)5 marks

Description

Limiting Factors in Photosynthesis

The rate of photosynthesis depends on light intensity, carbon dioxide concentration, and temperature. Each of these factors can limit the rate if they are not at optimal levels.

  1. a

    Identify two limiting factors that affect the rate of photosynthesis.

    [2]
  2. b

    Explain why temperature can limit the rate of photosynthesis.

    [3]
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