Title: Factors affecting photosynthesis - What happens during photosynthesis? - OCR 21C - GCSE Combined Science Revision - OCR 21st Century - BBC Bitesize
Headings: Factors affecting photosynthesis
What happens during photosynthesis? - OCR 21C
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Factors affecting photosynthesis
Light intensity
Carbon dioxide concentration
Temperature
Chlorophyll
The compensation point

Content: If oxygen production or carbon dioxide uptake is used as a measure of photosynthetic rate, the graphs are slightly different. The line does not go through the origin. This is because oxygen production and carbon dioxide uptake are affected by respiration as well as photosynthesis. For instance, if a graph is plotted of carbon dioxide uptake against light intensity: The compensation point is the light intensity at which the rate of photosynthesis is equal to the rate of respiration. A similar graph will be obtained if oxygen production is plotted against light intensity. previous
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