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
[{'content': 'Active moiety of CoA is \nSelect and explain. \nA. Acetyl group, B. Pantothenic acid, C. Thiol of beta alanine, D. Thiol of pantothenic acid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: -\xa0Synthesis of coenzyme A from pantothenate occurs in a series of\xa0 reactions.\xa0Pantothenate is\xa0 first\xa0phosphorylated to\xa0 which\xa0 cysteine is\xa0 added. Decarboxylation, followed by addition of AMP moiety and a phosphate (each from ATP) results in\xa0 coenzyme A.\n-Coenzyme A serves as a carrier of activated acetyl or acyl groups (as thiol esters).', 'role': 'assistant'}]