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5.3 Immune system and medicines

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Question 24
H

The table shows results from a randomised trial involving comparable patients.

Table

TreatmentNumber of patientsNumber who recovered
New medicine240180
Placebo16080

What is the difference between the recovery percentages in the two groups?

[1]
A

505050 percentage points

B

757575 percentage points

C

252525 percentage points

D

100100100 percentage points

Markscheme

5.3 Immune system and medicines Questions

  1. GCSE
  2. /Biology
  3. /5.3 Immune system and medicines

45 exam-style questions on Edexcel GCSE Biology 5.3 Immune system and medicines, covering 5.3.1 The specific immune system, 5.3.2 Response to immunisation, 5.3.3 Advantages and disadvantages of immunisation, 5.3.4 Antibiotics and bacterial infections, 5.3.5 Aseptic techniques in culturing, 5.3.6 Cross-sectional areas of cultures, 5.3.7 Stages of developing new medicines, and 5.3.8 Production of monoclonal antibodies. Each one has a worked solution and a mark scheme showing where the marks go.

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