A student is going to test whether light is needed for photosynthesis. Before the investigation, the student keeps a plant in a dark cupboard for 48 hours. Why does the student do this?
so that the leaves make more chlorophyll before the test
so that the leaves take in more carbon dioxide before the test
so that the enzymes in the leaves are not denatured by heat
so that the starch already stored in the leaves is used up
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.