Photosynthesis can be summarised by a word equation. carbon dioxide+water→glucose+X\text{carbon dioxide} + \text{water} \rightarrow \text{glucose} + \text{X}carbon dioxide+water→glucose+X What is substance X?
nitrogen
oxygen
starch
hydrogen
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.