The Model That Explains How an Enzyme and Substrate Fit

Question

The model that explains how an enzyme and substrate fit together is the
A)enzyme-substrate model.
B)lock-and-key model.
C)conformational model.
D)None apply.

Accepted Answer

The lock-and-key model explains how enzymes and substrates fit together. This model suggests that the enzyme has a specific active site that is complementary in shape to the substrate, like a lock and key. When the substrate binds to the enzyme's active site, the enzyme undergoes a conformational change that allows it to catalyze the reaction. The other options are not correct models for explaining enzyme-substrate interactions.