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: Microbiology
Mercaptoethanol splits Ig molecule into 
Select and explain. 
A. Two H and two L chains, B. Two Fab fragments and one Fc fragment, C. One Fab and two Fc, D. Two H and one L chain
A: Two H and two L chains
Answer: A: Two H and two L chains 
Explanation: It cleaves only disulphide bonds thus forming two H and two L chains.