Enzymes

Front

What are enzymes?

Back

Enzymes are proteins that act as catalysts to speed up chemical reactions in biological systems.

Front

Do enzymes act on many different substrates?

Back

False. Enzymes are specific to particular substrates.

Front

What does a substrate become after an enzyme catalyzes a reaction?

Back

A product.

Front

How do enzymes speed up reactions?

Back

By lowering the activation energy required for the reaction to occur.

Front

Can enzymes be used again and again?

Back

True. Enzymes are not consumed in the reactions they catalyze.

Front

What is the active site of an enzyme?

Back

The region on the enzyme where the substrate binds and the reaction occurs.

Front

What factors can affect enzyme activity?

Back

Temperature, pH, and substrate concentration can all affect enzyme activity.

Front

What is the role of cofactors in enzyme activity?

Back

Cofactors are non-protein molecules that assist enzymes in catalyzing reactions.

Front

What is enzyme specificity?

Back

Enzyme specificity refers to the ability of an enzyme to choose exact substrate from a group of similar chemical molecules.

Front

What happens to an enzyme after it catalyzes a reaction?

Back

The enzyme remains unchanged and can catalyze another reaction.