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6.3 Monitoring and maintaining health

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Question 14
F

A student tests an antibiotic on bacteria grown on agar.

The clear zone around the antibiotic disc is a circle with a diameter of 12 mm.

What is the area of the clear zone?

Use the equation: area =πr2= \pi r^2=πr2

[1]
A

36.0 mm236.0\ \text{mm}^236.0 mm2

B

37.7 mm237.7\ \text{mm}^237.7 mm2

C

113.1 mm2113.1\ \text{mm}^2113.1 mm2

D

452.4 mm2452.4\ \text{mm}^2452.4 mm2

Markscheme

6.3 Monitoring and maintaining health Questions

  1. GCSE
  2. /Biology
  3. /6.3 Monitoring and maintaining health

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.

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