This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'True about genetic code \nSelect and explain. \nA. AUA codes for methionine in mitochondria, B. UGA codes for selenocysteine, C. AUG codes for initiator codon in mammalian cell, D. AGA & AGG act as chain terminator in mammalian', 'role': 'user'}, {'content': 'Answer: A \nExplanation: UGA is a stop codon, but in special circumstance, it stands for seleno-cysteine the codon AUG both codes for methionine and serves as an initiation site: the first AUG in a mRNA&;s coding region is where translation into protein begins.Ref: DM Vasudevan, 7th edition, page no: 599', 'role': 'assistant'}]