This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
Exogenous adrenaline is metabolished by 
Select and explain. 
A. AchE, B. COMT, C. Decarboxylase, D. Acetyl transferase
B: COMT
Answer: B: COMT 
Explanation: Exogenous adrenaline is metabolised by Catechol-O-methyltransferase (COMT) in liver and other tissues. Metabolism does not play an impoant role in terminating the action of endogenous catecholamines. Ref: Biochemistry by U. Satyanarayana 3rd edition Pgno : 441