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CAIE A-Level Biology 10.2.1 Penicillin Action on Bacteria

Practise explaining competitive inhibition of bacterial transpeptidase, weakened peptidoglycan cross-links and osmotic lysis of actively growing cells.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • identify penicillin as competitively inhibiting an enzyme in peptidoglycan cross-linking
  • explain weakened cell walls as unable to withstand internal osmotic pressure
  • connect water entry and lysis with actively growing or dividing bacterial cells

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