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
In one carbon metabolism Serine loses which carbon atom? 
Select and explain. 
A. Alpha, B. Beta, C. Gamma, D. Delta
B: Beta
Answer: B: Beta 
Explanation: Ans. B. BetaCarbon atomEnzyme is Serine Hydroxy Methyl TransferaseSerine loses the beta Carbon atom to form Glycine and Methylene THFA