Front

A biological catalyst that speeds up chemical reactions without being consumed.

Back

Enzyme

Front

The molecule upon which an enzyme acts.

Back

Substrate

Front

The specific region on an enzyme where the substrate binds.

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Active Site

Front

The molecules produced from the enzyme-catalyzed reaction.

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Product

Front

A substance that speeds up a reaction by lowering activation energy.

Back

Catalyst

Front

A non-protein molecule (usually a metal ion) that helps enzymes function.

Back

Cofactor

Front

An organic cofactor, often derived from vitamins, that assists enzyme activity.

Back

Coenzyme

Front

The protein portion of an enzyme, without its cofactor.

Back

Apoenzyme

Front

A complete, active enzyme that includes both the apoenzyme and its cofactor.

Back

Holoenzyme

Front

A secondary binding site on an enzyme that regulates activity when a molecule binds.

Back

Allosteric Site