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3.1 Communicable diseases

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Question 19
F

A population of bacteria is treated with an antibiotic and a few bacteria survive. Why does the number of resistant bacteria then increase?

[1]
A

The antibiotic causes the surviving bacteria to become resistant to it

B

The surviving bacteria were already resistant and reproduce to form more

C

The surviving bacteria make the patient resistant, who then infects others

D

The antibiotic becomes weaker each time it is used against the bacteria

Markscheme

3.1 Communicable diseases Questions

  1. GCSE
  2. /Biology
  3. /3.1 Communicable diseases

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.

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