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3.1 Communicable diseases

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Question 47
F

A trial was carried out on a new drug for asthma. 500 patients took part. The patients were put into two groups at random. Group 1 was given the new drug and Group 2 was given a placebo. Neither the patients nor the doctors knew which group each patient was in.

a.

Explain why the patients were put into the two groups at random.

[2]
b.

Explain one advantage of the doctors not knowing which group each patient was in.

[2]
c.

The placebo given to Group 2 was an asthma treatment that is already in use, rather than a tablet containing no drug at all. Suggest why.

[1]
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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