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
Codons are present in 
Select and explain. 
A. t-RNA, B. r-RNA, C. m-RNA, D. si-RNA
C: m-RNA
Answer: C: m-RNA 
Explanation: 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