On a graph of rate against light intensity, the plateau at high light shows that

  1. light is limiting
  2. the plant has died
  3. another factor, such as CO₂, is now limiting
  4. photosynthesis has stopped
Answer

C) another factor, such as CO₂, is now limiting

A different factor limits. AS & A Level Biology · Topic 13 Photosynthesis · 13.2 Investigation of limiting factors

Biology MCQ · More A Level Biology: Photosynthesis MCQs · Practise