What is a codon?

Responses

A set of 3 three nucleotides on DNA
A set of 3 three nucleotides on DNA

A set of 3 three nucleotides on tRNA
A set of 3 three nucleotides on tRNA

A set of 3 three nucleotides on mRNA
A set of 3 three nucleotides on mRNA

A set of 3 three nucleotides on rRNA
A set of 3 three nucleotides on rRNA

A codon is a set of three nucleotides on mRNA. It codes for a specific amino acid or functions as a start or stop signal for protein synthesis.