Explain4 marksStandard
Explain how penicillin acts on bacteria and why it is not effective against viruses. Describe the steps that can be taken by hospitals and patients to reduce the development of antibiotic resistance.
CAIE A Level Biology 9700 · Infectious diseases
Infectious diseases: explain question
How this question is marked
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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