A-LevelBiologyInfectious diseasesOct/Nov 2010Paper 1 Q361 Mark
The data shows how the number of human deaths caused by the bacterium Staphylococcus aureus has changed from 1997 to 2005. Methicillin is an antibiotic used to treat a disease caused by S. aureus. MRSA is methicillin-resistant S. aureus. [Table showing total number of death certificates with S. aureus and total number of death certificates with MRSA per year from 1997 to 2005] Which statement is not supported by this data?
AMore people have MRSA so the disease spreads.
BMRSA is more likely to lead to death as there is no treatment.
CResistant strains of MRSA are becoming more common.
DS. aureus will always cause humans to die.
✓ Correct Answer
The correct answer is D: S. aureus will always cause humans to die.
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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