This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of these amino acids does not enter the Krebs cycle by forming Acetyl-CoA pyruvate? 
Select and explain. 
A. Glycine, B. Tyrosine, C. Hydroxyprolinc, D. Alanine
B: Tyrosine
Answer: B: Tyrosine 
Explanation: Ans: B. Tyrosine(Ref: Harper 30Ie p165)Tyrosine enters Krebs cycle fumarate, while all others form pyruvate to enter the Krebs cycle.