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
Active moiety of CoA is 
Select and explain. 
A. Acetyl group, B. Pantothenic acid, C. Thiol of beta alanine, D. Thiol of pantothenic acid
D: Thiol of pantothenic acid
Answer: D: Thiol of pantothenic acid 
Explanation: - Synthesis of coenzyme A from pantothenate occurs in a series of  reactions. Pantothenate is  first phosphorylated to  which  cysteine is  added. Decarboxylation, followed by addition of AMP moiety and a phosphate (each from ATP) results in  coenzyme A.
-Coenzyme A serves as a carrier of activated acetyl or acyl groups (as thiol esters).