<prompt> The first step in fatty acid synthesis involves:Acetyl-CoA carboxylaseHydroxyl-CoA dehydrogenaseAcetyl dehydrogenasePyruvate kinase  <response>: Ans. A. Acetyl-CoA carboxylaseRef Harper 31e page 217Fatty Acid SynthesisBy two enzyme system1. Acetyl-CoA carboxylase2. Fatty acid synthase complexAcetyl-CoA CarboxylaseConverts acetyl-CoA 2C to malonyl-CoA in the presence of ATP.Acetyl-CoA carboxylase has a requirement for the B vitamin biotin.It is a multienzyme protein.This is the rate limiting stepQ in the fatty acid synthesis.Acetyl-CoA carboxylase is not a part FAS ComplexQ. 