What are the different types of RNA?

MRNA (messenger) single stranded that specifies aa in polypeptide chains through transcription and translation. it is synthesized on template transcribed non coding DNA strand it is the only coding RNA. tRNA (transfer) single stranded, particular arrangement resembles shape of cloverleaf. used in protein synthesis as an adapter between mRNA and aa, each tRNA is linked to an aa covalently and is so called charged tRNA rRNA; located in ribosomes.