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3.1 Communicable diseases

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Question 87
F

In a trial of a new drug for arthritis, half of the patients were given the drug and half were given a placebo. Why were some patients given a placebo?

[1]
A

So that any effect of the drug can be compared with no active treatment

B

So that the patients given the drug do not know they are being treated

C

So that the drug can be tested for toxicity before patients receive it

D

So that a smaller number of patients is needed to complete the trial

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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