Definition

A part of DNA that carries the instructions for making a specific protein or enzyme, acting as a unit of heredity.

Example

The cistron is essential for the production of the enzyme needed for digestion.

Conversation

I was reading about genetics and came across the term cistron.

Oh really? What does it mean exactly?

It refers to a section of DNA that codes for a single polypeptide, a bit like a gene.

That’s interesting! I didn’t know cistrons played such a specific role.

Synonyms & Antonyms

Root Explanation

Cistron is derived from the Greek word "kistron" (meaning a small container or receptacle). The prefix "cis-" (meaning on this side) is also related to the Latin "cis" (meaning on this side of). The term refers to a segment of DNA that codes for a specific protein, essentially acting as a 'container' for genetic information.

Memory Tip

Think of a 'container' ('kistron') that holds specific information ('cis-') — that's why a cistron is a segment of DNA that contains the instructions for making a protein.

Visually Confused Words