Biology, Proteins And Enzymes

Question 1

Describe the lock and key model and how an enzyme acts as a catalyst

Answer 1

Named enzyme has a specific shaped active site which is complementary to only named substrate. The substrate binds to active site forming an enzyme-substrate complex which lowers activation energy.

Question 2

Describe the induce fit model and how an enzyme acts as a catalyst

Answer 2

Active site is not complementary so it changes its shape as the substrate binds, so it’s complementary to the substrate. Enzyme-substrate complex forms, stressing bonds in substrate and reducing activation energy.