試題詳解

36. It is crucial that regulation occurs at the pyruvate dehydrogenase because:
(A) Pyruvate kinase is reversible.
(B) Lactate dehydrogenase is the only other enzyme to use pyruvate.
(C) The product acetyl-CoA is committed to oxidation in the citric acid cycle or fatty acid biosynthesis.
(D) Alanine aminotransferase would use the pyruvate.
(E) All of the above.