AS Biology - Gas exchange in plants

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Gas exchange in leaves


CO2 + H2O (+ light and chlorophyll) --> O2 + C6H12O6


O2 + C6H12O6 --> CO2 + H20


The volumes of gases exchanged within a plant change as rates of photosynthesis and respiration change:

·          During photosynthesis, CO2 is used and so diffuses into the cells –


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