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9700 · 3.1

Mode of action of enzymes

Cambridge 9700 Paper 2 — Mode of action of enzymes (3.1). A-Level Notes diagram-backed lesson with premium structure and live visuals.

Need to know

What you need to know

  • 3.1 Mode of action of enzymes.
  • Enzymes are globular proteins that catalyse metabolic reactions.
  • They function as biological catalysts by lowering the activation energy.
  • Enzymes are highly specific due to the unique 3D shape of their active site.
  • The active site is complementary to the substrate, forming an enzyme-substrate complex.
  • The induced-fit model describes the flexible nature of the active site.
  • Enzymes have hydrophilic R-groups on the outside, ensuring they are soluble.

Explanation

Mode of action of enzymes

  1. 3.1 Mode of action of enzymes.
  2. Enzymes are globular proteins that catalyse metabolic reactions.
  3. They function as biological catalysts by lowering the activation energy.
  4. Enzymes are highly specific due to the unique 3D shape of their active site.