Definition

A part of DNA that contains the information needed to make proteins, which is copied into messenger RNA during the process of protein synthesis.

Example

The scientist studied the exon to understand how it contributes to protein production.

Conversation

Have you ever heard of an exon?

Yeah, I think it’s part of DNA, right?

Exactly! It's the part that codes for proteins.

That's really interesting; I didn't know that!

Synonyms & Antonyms

Root Explanation

Exon is derived from the prefix "ex-" (meaning out of or away from) and the root "on" (from Greek "on", meaning being or existence). The term "exon" refers to a segment of a gene that codes for proteins and is expressed, thus it signifies the part that is 'expressed out' from the gene during the process of transcription and translation.

Memory Tip

Think of 'ex-' meaning 'out of' and 'on' relating to 'being' — this helps you remember that an exon is a part of a gene that is expressed or 'brought out' to form proteins.

Visually Confused Words