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Which of these is common to C3 and C4 plants?(a) OAA(b) PGA(c) Calvin cycle(d) PhotorespirationThis question was posed to me during an interview.This interesting question is from Higher Plants Photosynthesis in chapter Photosynthesis in Higher Plants of Biology – Class 11

Answer»

The correct answer is (c) Calvin cycle

Explanation: In C3 PLANTS, the first stable product of carbon DIOXIDE fixation is 3-PGA or 3-phosphoglyceric acid. For C4 plants, it is OAA or oxaloacetic acid. C4 plants lack PHOTORESPIRATION. The Calvin cycle is common to both.



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