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
All of the following are required for synthesis of glutamine except: 
Select and explain. 
A. Glutamate, B. Ammonia, C. Pyridoxal phosphate, D. ATP
C: Pyridoxal phosphate
Answer: C: Pyridoxal phosphate 
Explanation: Glutamic Acid (Glutamate)

Nonessential Amino Acid
Glucogenic Amino Acid
Central role in metabolism of Amino Acid
Amino group of all Amino Acids are concentrated as Glutamate by transamination.