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Which one of the following is true about C4 plants?

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Which one of the following is true about C4 plants?

(a) They minimize rubisco oxygenase activity by fixing CO2 into oxaloacetate

(b) They mainly occur in areas of high temperature and light intensity

(c) They minimize the rubisco oxygenase activity by fixing CO2 into phosphoenolpyruvic acid

(d) C3 plants are more efficient in photosynthesis than C4 plants

This question was addressed to me in an international level competition.

My doubt is from The Role of Mitochondria in Apoptosis and Oxidative Stress topic in chapter Oxidative Phosphorylation and Photophosphorylation of Biochemistry

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The correct option is (a) They minimize rubisco oxygenase activity by fixing CO2 into oxaloacetate

Explanation: C4 plants are more efficient in photosynthesis than C3 plants.

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