A-LevelBiologyInfectious diseasesOct/Nov 2016Paper 1 Q381 Mark
Why is it difficult to control the spread of measles? 1 Global air travel for commerce and tourism has increased. 2 The virus that causes measles rapidly evolves resistance to antibiotics. 3 The virus that causes measles shows great antigenic variability. 4 Civil unrest and poverty result in overcrowded living conditions.
A1, 2 and 4
B1, 2 and 3
C1 and 4 only
D4 only
✓ Correct Answer
The correct answer is C: 1 and 4 only
📋 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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