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
Succinyl Co-A is formed from 
Select and explain. 
A. Histidine, B. Leucine, C. Valine, D. Lysine
C: Valine
Answer: C: Valine 
Explanation: Pyruvate: Alanine, cysteine, glycine,hydroxyproline, serine and threonine.
Alpha-Ketoglutarate: Glutamine, glutamate, arginine, histidine and proline.
Succinyl CoA: lsoleucine, methionine, threonine and valine.
Fumarate: Phenylalanine and tyrosine.
Oxaloacetate: Asparagine and aspartate.
Satyanarayana, Ed3, Pg No 374