This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'Initial amino acid in prokaryotic protein synthesis \nSelect and explain. \nA. Arginine, B. Methionine, C. Formyl-methionine, D. Alanine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Activation of amino acid is the first phase of translation, among which initiation of protein synthesis is the first step. It is divided into 4steps .1st one is recognition steps. In eukaryotes, the first amino acid incorporated is methionine(AUG codon). But in prokaryotes, the same codon stands for N-formyl methionine, which is the first amino acid.Ref: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 600', 'role': 'assistant'}]