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  4. Which of the following statement best support the fact that photorespiration commonly occurs in C 3 plants?

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Q. Which of the following statement best support the fact that photorespiration commonly occurs in $C _3$ plants?

Photosynthesis in Higher Plants

Solution:

Photorespiration ( $C _2$ cycle) is enhanced by bright light, high temperature, high oxygen and low $CO _2$ concentration. In $C _3$ plants, RuBisCO, acts as ribulose biphosphate oxygenase under low atmospheric concentration of $C _2$ and increased concentration of $O _2$.