This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
[{'content': 'In one carbon metabolism Serine loses which carbon atom? \nSelect and explain. \nA. Alpha, B. Beta, C. Gamma, D. Delta', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. BetaCarbon atomEnzyme is Serine Hydroxy Methyl TransferaseSerine loses the beta Carbon atom to form Glycine and Methylene THFA', 'role': 'assistant'}]