Directionality, in molecular biology, refers to the end-to-end chemical orientation of a single strand of nucleic acid. By convention, single strands of DNA and RNA sequences are written in 5' to 3' direction. ...

What is the directionality of RNA?

An RNA strand is synthesized in the 5′ → 3′ direction from a locally single stranded region of DNA.

Do RNA strands have directionality?

By convention, single strands of DNA and RNA sequences are written in a 5′-to-3′ direction except as needed to illustrate the pattern of base pairing.