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In the C₄ pathway, regeneration of PEP from the 3-carbon molecule takes place in the

(a) mesophyll cells Correct
(b) xylem Your answer
(c) stroma of bundle sheath chloroplasts Your answer
(d) bundle sheath cells Your answer

Your answer: Correct answer: (a)

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Explanation

Why (a) is correct

The 3-carbon molecule returns to the mesophyll cells, where PEP is regenerated.

Why the other options are wrong

(b) · your answer Xylem has no role in regenerating PEP.
(c) · your answer PEP is not regenerated in the bundle sheath.
(d) · your answer The bundle sheath releases the 3-carbon molecule; PEP is formed in the mesophyll.

NCERT point: Regenerating PEP uses ATP.

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