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
Glutamine in blood acts as- 
Select and explain. 
A. NH3 transpoer, B. Toxic element, C. Store energy, D. Abnormal metabolite
A: NH3 transpoer
Answer: A: NH3 transpoer 
Explanation: Glutamine is the major form of transpo of ammonia