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6.3 The development of understanding of genetics and evolution

6.3 The development of understanding of genetics and evolution

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Question 13
H

MRSA is a strain of the bacterium Staphylococcus aureus. MRSA is resistant to many antibiotics. The figure shows the number of cases of MRSA infection reported in the hospitals of one country between 2005 and 2020.

Figure: The number of cases of MRSA infection reported in the hospitals of one country between 2005 and 2020

image

a.

Describe the trend shown in the figure.

[2]
b.

Use the figure to calculate the percentage decrease in the number of reported cases between 2005 and 2011.

[3]
c.

Explain how a strain of bacterium such as MRSA becomes resistant to an antibiotic and then becomes common.

[4]
d.

Explain why developing new antibiotics is unlikely to solve the problem of resistant strains of bacteria.

[2]
Markscheme

6.3 The development of understanding of genetics and evolution Questions

  1. GCSE
  2. /Biology
  3. /6.3 The development of understanding of genetics and evolution

40 exam-style questions on AQA GCSE Biology 6.3 The development of understanding of genetics and evolution, covering 6.3.1 Theory of evolution, 6.3.2 Speciation, 6.3.3 The understanding of genetics, 6.3.4 Evidence for evolution, 6.3.5 Fossils, 6.3.6 Extinction, and 6.3.7 Resistant bacteria. Each one has a worked solution and a mark scheme showing where the marks go.

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