Which of these amino acids does not enter the Krebs cycle by forming Acetyl-CoA pyruvate?
(A) Glycine (B) Tyrosine (C) Hydroxyprolinc (D) Alanine
(B) Ans: B. Tyrosine(Ref: Harper 30Ie p165)Tyrosine enters Krebs cycle fumarate, while all others form pyruvate to enter the Krebs cycle.