A person with gonorrhoea is given a course of antibiotics lasting seven days. The person stops taking the antibiotic after three days, when the symptoms disappear. What is the most likely consequence?
Resistant bacteria are killed first, so the infection cannot return
The surviving bacteria become immune to every type of antibiotic
Resistant bacteria may survive and reproduce, so the illness returns
The surviving bacteria mutate to form an entirely new pathogen type
176 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.