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3.1 Communicable diseases

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Question 69
F

A trial of a new medicine is described as double blind. What does this mean?

[1]
A

The patients do not know which treatment they have, but the doctors do

B

Neither the patients nor the doctors know the results until the trial ends

C

Neither the patients nor the doctors know which treatment each patient has

D

The doctors do not know which patients have agreed to join 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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