Since the mRNA is read as codons, how many nucleotides are in each codon?

1 Answer | Add Yours

ncchemist's profile pic

ncchemist | eNotes Employee

Posted on

mRNA stands for messenger RNA and it serves as the bridge between the two phases of protein biosynthesis.  In the transcription phase, a sequence of DNA unbinds and the sequence of nucleotides is used to make a complementary strand of messenger RNA.  The mRNA then exits the nucleus and goes to a ribosome for the translation phase, where the mRNA is converted to a polypeptide sequence of amino acids to make a new protein.  A codon refers to a sequence of three nucleotide that in turn codes for a specific amino acid.  In addition, there are stop and start codons which tell the ribosome to either start or stop a new polypeptide sequence.  So a codon is made up of three nucleotides.

We’ve answered 317,397 questions. We can answer yours, too.

Ask a question