Six facts about enzymes

Enzymes are globular proteins.

They reduce the activation energy needed for a reaction to proceed and produce products.

Enzymes have a region called an active site. The site is the "lock" into which a substrate "key" fits.

The enzyme then fits closely around the substrates. This is called induced fit.

Enzyme activity is affected by substrate type, temperature, pH and substrate concentration.

Enzyme activity can be inhibited or promoted by other substances.