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Reason why enzyme speeds up reactions

Shape of active site

Can remove groups to form or break double bonds

A 3D, complementary pocket on enzyme that binds to substrate

All digestive enzymes belong to this class of enzymes

Induced fit model

Urease

Catalase

Lock & Key model

Catalyses oxidation reduction reactions, uses NAD or FAD

Example of a common name of an enzyme

Hydrolases

symbolizes exact fit

lowers activation energy

Oxido-reductases

determines specificity of the enzyme

active site

indicates that the enzyme active site is flexible

example of absolute specificity

Lyases