Enzymes

Question 1

Describe the induced fit model:

Answer 1

The substrate has to make the active site change shape.

Question 2

Describe how competitive inhibitors work:

Answer 2

• Competitive inhibitors have similar shapes to the substrate molecules.
• They compete with the substrate to bind to the active site.
• They block the active site so no substrate can fit into it.

Question 3

Describe how non-competitive inhibitors work:

Answer 3

• non-competitive inhibitors bind to the enzyme away from its active site.
• This causes the active site to change shape so substrate molecules can no longer bind to it.