True about genetic code: (A) 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
Answer is A. 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