Question 7
FA person is given a vaccine against a disease on day 0.
On day 40, the person is infected with the pathogen that causes the disease. The person does not become ill.
The Figure shows the concentration of antibodies against this pathogen in the person's blood.
Figure
a.[1]
Give the maximum concentration of antibodies after the vaccine was given.
b.[1]
Calculate how many times greater the maximum concentration of antibodies after infection is than the maximum concentration after the vaccine.
c.[3]
Explain why the person did not become ill when infected on day 40.
d.[2]
The antibodies made by the person only attach to this pathogen.
Explain why.
6.3 Monitoring and maintaining health Questions
181 exam-style questions on OCR GCSE Biology 6.3 Monitoring and maintaining health, covering 6.3.1 Health and disease, 6.3.2 Interactions between diseases, 6.3.3 Spread of communicable diseases, 6.3.4 Common infections and diseases, 6.3.5 Physical plant defence responses, 6.3.6 Chemical plant defence responses, 6.3.7 Detecting and identifying plant diseases, 6.3.8 White blood cells and platelets, 6.3.9 Non-specific defence systems, 6.3.10 The immune system, 6.3.11 Monoclonal antibodies, 6.3.12 Vaccines and medicines, 6.3.13 Aseptic techniques, 6.3.14 Discovery and development of new medicines, 6.3.15 Causes of non-communicable diseases, 6.3.16 Treatments for cardiovascular disease, 6.3.17 Lifestyle factors and non-communicable diseases, 6.3.18 Cancer, 6.3.19 Stem cells in medicine, 6.3.20 Gene technology in medicine, and 6.3.21 The human genome and medicine. Each one has a worked solution and a mark scheme showing where the marks go.