Question

The first acceptor of $CO_{2}$ in $C_{4}$ plant is:

• A. pyruvic acid
• B. phosphoenol pyruvic acid
• C. acetic acid
• D. oxaloacetic acid

Answer 1

Answer: (B)

phosphoenol pyruvic acid

Answer 2

$C _{4}$ plants show $CO _{2}$ acceptors at two levels but the first acceptor of $CO _{2}$ is a 3C -compound which after acceptance of $CO _{2}$ converts into a $C _{4}$ plants is given to them. The first $CO _{2}$ acceptor is a 3C-compound.