Definition

A type of enzyme that helps break down nucleic acids by removing single nucleotides from the ends of DNA or RNA chains.

Example

Exonucleases play a crucial role in DNA repair and replication processes.

Conversation

Have you heard about exonuclease enzymes and what they do?

Yeah, they remove nucleotides from the ends of DNA or RNA chains, right?

Exactly! It's fascinating how they play a role in DNA repair.

I know! It's amazing how every little enzyme has such an important function.

Synonyms & Antonyms

Root Explanation

**Exonuclease** → It is formed from "exo-" (meaning outside) and "nuclease" (from "nucleus", meaning kernel or core, and "-ase", a suffix used for enzymes). The word refers to an enzyme that removes nucleotides from the ends of a nucleic acid chain, acting on the outside of the molecule.

Memory Tip

Think of 'exo-' meaning 'outside' and 'nuclease' relating to the 'core' of nucleic acids — this helps you remember that an exonuclease works on the outside ends of nucleic acid chains.

Visually Confused Words