MRNA 3 types of RNA are known, and all are involved in protein synthesis: ribozomal RNA, rNRNA, messenger RNA, mRNA and transfer RNA, nRNA. Messenger RNA (messenger ribonucleic acid) is a sequence of nucleotides that corresponds to the transcription of a piece of DNA ( gene), which determines the order in which the amino acids of a protein will bind acting as a template for the synthesis of that protein.