What are Enzymes?

Temperature

Inhibitors

pH

Substrate Concentration

This can be described by the lock and key , and induced fit models of enzyme action. The lock and key model is based on complementary shapes between the enzyme and substrate. The substrate fits into the enzyme.

The induced fit model: (the enzyme changes shape to “hug” the substrate)

The enzyme’s shape is not exactly matched to the substrate, but it is able to accommodate the substrate with a close enough shape into an enzyme-substrate complex and carry out catalysing that reaction.