Fig. 5.1 is a graph showing the effect of carbon dioxide concentration and light intensity on the rate of photosynthesis.

1. aComplete the symbol equation for photosynthesis: 6CO₂ + … → … + 6O₂. [2]
2. bFrom Fig. 5.1, find the rate of photosynthesis at 0.03% carbon dioxide when light intensity is low and when it is high. [2]
3. cState a conclusion about the effect of light intensity on the rate of photosynthesis. [1]
4. dSuggest an explanation for this conclusion. [3]
5. eState one factor, other than carbon dioxide concentration and light intensity, that can affect the rate of photosynthesis. [1]

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