Enzymes are a linear chain of amino acids. This creates a 3 dimensional structure. This is the primary structure. The secondary structure describes the localized polypeptide chain structures.

From a lock and key model we can know that there are specific shapes of active sites and the molecules. This means that each enzyme can only catalyze one type of reaction.

Enzyme acts as high-molecular-weight compounds.

Enzyme are thermos-labile. Dried enzyme can withstand heat about 100 Celsius.

Enzymes will be killed or inactive when near to the temperature of boiling water.

Enzyme can work optimally between 25-45 Celsius.

Enzyme can turn substrate to substance.

Each enzyme have their own function.

Enzyme initiate and accelerate biochemical reactions.

The reaction of enzymes can be accelerated.

Rising the temperature can increase the speed of reaction and lowering it can cause it to become slower.

Changing the pH outside of the range of the enzyme, will cause it to become slower.

Increase of concentration will speed up the reaction.

Increasing the concentration will increase the rate of reaction.

The binding of a substrate to an enzyme causes a change in the shape of the enzyme to change its activity.

A molecule other than the substrate binds to the enzyme’s active site.

The inhibitor binds only to the substrate-enzyme complex in uncompetitive inhibition.

A chemical binds to a location other than the active site in non-competitive inhibition .