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Question

The primary CO2 acceptor in C4 plant is

A
RuBP
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B
Phosphoenol pyruvate
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C
PEP carboxylase
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D
PGA
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Solution

The correct option is B Phosphoenol pyruvate
In C4 plants, a 4 - C compound oxaloacetic acid (OAA) is the first stable product, and phosphoenol pyruvate (PEP) is the CO2 acceptor. This reaction is catalysed by the enzyme PEP carboxylase in mesophyll cells of the leaf.

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