NEET Biology Photosynthesis In Higher Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Answer: (c)

$C_4$ pathway was first reported in members of Family Gramineae (grasses) like sugarcane, maize, sorghum, etc. In C4 plants, PEP case (PEP carboxylase) is the key enzyme used to fix $CO_2$ in $C_4$ plants. Oxaloacetic acid is a 4-C compound and is the first stable product so this pathway is known as $C_4$ cycle.

Phosphoenol pyruvic acid + Carbon dioxide $→ ↖ {\text"PEP - carboxylase"}$ Oxaloacetic acid