Q.

Which of the following statement best support the fact that photorespiration commonly occurs in C3 plants?

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a

C3 plants don’t possess Kranz anatomy.

b

C3 plants have usually high CO2 compensation species.

c

C3 plants are less efficient in photosynthesis.

d

C3 plants are characterized by RuBP oxygenase activity under high oxygen supply.

answer is D.

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Detailed Solution

Photorespiration (C2 cycle) is enhanced by bright light, high temperature, high oxygen and low CO2 concentration. In C3 plants, RuBisCO, acts as ribulose biphosphate oxygenase under low atmospheric concentration of CO2 and increased concentration of O2. Thus, photorespiration is favoured by C3 plants.

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Which of the following statement best support the fact that photorespiration commonly occurs in C3 plants?