Question

What are exons?

Answer 1

Exons are the “coding” sequences of a gene that provide the instructions for making proteins. During gene expression, the cell removes non-coding sections (introns) and joins the exons together to form a mature mRNA molecule. Because they are the parts of the genetic code actually “expressed” as functional products, they are critical to biological life, even though they make up only a tiny fraction of our total DNA.