Question

48. Phosphonol pyruvate (PEP) is the primary CO₂acceptor in :
(1) C₃ plants (2) C₄ plants
(3) C₂ plants (4) C₃ and C₄ plants

Answer 1

Explanation:

C4 plants ( present in mesophyll)

Answer 2

Phosphoenol pyruvate is the primary CO2 acceptor in C4 plants.

• Most of the tropical plants the first product is a 4-carbon compound, so it is known as C4.

• In C4 plants the pyruvic acid is converted into phosphoenol pyruvic acid it is again converted into Oxaloacitic acid so in this reaction the primary acceptor is Co2.

• Phospho enol pyruvate is mostly found in the mesophyll cells. These cells accept the atmospheric CO2 in C4 plants.

• So the right option is (2) C4 plants.