Question

Phosphoenol pyruvate, an intermediate in glycolysis, is also an important molecule in which of the following pathways/cycles?

• A. Kerbs cycle
• B. C${}_3$ cycle
• C. C${}_4$ cycle
• D. None of the above

Answer 1

The correct option is C C${}_4$ cycle

The pathway of the breakdown of glucose into pyruvic acid is termed as glycolysis. Phosphoenolpyruvate is an intermediate in glycolysis.

Phosphoenolpyruvate is important in
C${}_4$ cycle of plants. The C${}_4$ pathway initiates with a molecule of phosphoenolpyruvate (PEP) which is a 3-carbon molecule. This is the primary $C{O}_2$ acceptor and the carboxylation takes place with the help of an enzyme called PEP carboxylase. They yield a
4-carbon molecule called oxaloacetic acid (OAA).