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3.1 Communicable diseases

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Question 9
F

In a clinical trial, patients are put into the drug group and the placebo group at random. Why are the patients allocated at random?

[1]
A

So that both groups contain exactly the same number of male and female patients

B

So that the two groups are as similar as possible and the results are not biased

C

So that the doctors can choose the patients most likely to be helped by the drug

D

So that every patient in the trial has an equal chance of being given a placebo

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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