Enzymes are ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up that ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up chemical reactions in cells.

Enzymes need a specific constant temperature to work at their ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up.

At low temperatures, small increases in temperature increase the frequency and energy of ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up between an enzyme and other molecules, so the rate of reaction ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up.

At ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up temperatures enzymes stop working (‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up).

Only molecules with the correct ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up can fit into the enzyme. This is known as the ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up model.

Enzymes have a small part called the ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up where certain molecules bind to the enzyme and the reaction occurs.

The shape of the active site is can be changed by ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up above a certain temperature and altering the ‘lock and key’active sitecollisionsdenatureheatinghigherincreasesoptimumpHproteinsshapespeed up, so that the molecules can no longer fit and the reaction cannot happen.