Penicillin kills bacteria by

  1. breaking down DNA
  2. blocking ribosomes in humans
  3. preventing cross-links forming in the cell wall, so cells burst
  4. destroying viruses
Answer

C) preventing cross-links forming in the cell wall, so cells burst

Weak walls lead to osmotic lysis. AS & A Level Biology · Topic 10 Infectious Diseases · 10.2 Antibiotics

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