The 1st reaction in the citric acid cycle is binding?

Question

A. carbon dioxide to a four-carbon (C4) molecule

B carbon dioxide to a five-carbon (C5) molecule

c acetyl-CoA to a C4 molecule

D. Acetyl-CoA to a C5 molecule

Answer 1

The answer is C acetyl CoA is bound to oxaloacetate (4C ) via the enzyme citrate synthase. Citrate synthase must bind OAA first before the binding site for acetyl CoA is exposed.