試題詳解

40. It is crucial that regulation occur at 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.