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In C₃ plants, the Calvin cycle occurs in the

(a) mesophyll cells Correct
(b) epidermal cells Your answer
(c) guard cells only Your answer
(d) bundle sheath cells only Your answer

Your answer: Correct answer: (a)

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Explanation

Why (a) is correct

In C₃ plants, the Calvin cycle runs in the chloroplasts of the mesophyll cells.

Why the other options are wrong

(b) · your answer Epidermal cells usually lack chloroplasts.
(c) · your answer Guard cells photosynthesise a little, but the main site is the mesophyll.
(d) · your answer Restriction of the Calvin cycle to the bundle sheath is a feature of C₄ plants.

NCERT point: C₃: all fixation in the mesophyll. C₄: split between mesophyll and bundle sheath.

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