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2017 Photosynthesis in Higher Plants $C_4$ pathway (Hatch–Slack pathway) Easy Question 39 of 91 in Photosynthesis in Higher Plants

Phosphoenol pyruvate (PEP) is the primary $CO_2$ acceptor in:

A $C_3$ plants

B $C_4$ plants

C $C_2$ plants

D $C_3$ and $C_4$ plants

The answer is B.

Solution

PEP carboxylase fixes $CO_2$ in $C_4$ mesophyll.

PEP is a 3C compound which serves as the primary $CO_2$ acceptor in the mesophyll cell cytoplasm of $C_4$ plants like maize, sugarcane and $Sorghum$.

Concept pep-c4-primary-acceptor

Photosynthesis in Higher Plants in past papers

91 questions from this chapter have appeared across 26 exam years.