Codons are present in: (A) t-RNA, (B) r-RNA, (C) m-RNA, (D) si-RNA
Answer is C. A triplet sequence of nucleotides on the mRNA is the coson for each amino acid. The codons are on the mRNA. Each codon is a consecutive sequence of three bases on the mRNA , Eg : UUU codes for phenylalanine. Reference : DM.VASUDEVAN.TEXTBOOK SEVENTH EDITION ; PAGE NO : 598