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CAIE A-Level Biology 3.2.3 Competitive and Non-Competitive Inhibitors

Practise distinguishing active-site competition from allosteric inhibition using substrate rescue, Vmax and Km changes, reversible binding and kinetic-graph evidence.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • explain competitive inhibition through reversible occupation of the enzyme active site
  • use unchanged Vmax with increased Km as evidence for competitive inhibition
  • use reduced Vmax and no substrate rescue as evidence for non-competitive inhibition

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