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In C₃ plants, the CO₂ acceptor and the carboxylating enzyme are, respectively,

(a) PEP and PEP carboxylase Your answer
(b) OAA and RuBisCO Your answer
(c) RuBP and RuBisCO Correct
(d) 3-PGA and RuBisCO Your answer

Your answer: Correct answer: (c)

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Explanation

Why (c) is correct

In C₃ plants, the CO₂ acceptor is RuBP (a 5-carbon sugar) and the enzyme is RuBisCO.

Why the other options are wrong

(a) · your answer PEP and PEP carboxylase are the acceptor and enzyme of C₄ plants.
(b) · your answer OAA is the first product of C₄ plants, not the acceptor.
(d) · your answer 3-PGA is the product, not the acceptor.

NCERT point: RuBP + CO₂ → 2 × 3-PGA (RuBisCO).

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