A-LevelBiologyCell structureMay/June 2017Paper 1 Q31 Mark
The recently discovered Pandoravirus measures 1000 nm in diameter. The Mimivirus has a diameter of 400 nm. What can be detected using a light microscope with a maximum resolution of 0.25 µm?
Aboth the Mimivirus and the Pandoravirus
Bneither the Mimivirus nor the Pandoravirus
Cthe Mimivirus, but not the Pandoravirus
Dthe Pandoravirus, but not the Mimivirus
✓ Correct Answer
The correct answer is A: both the Mimivirus and the Pandoravirus
📋 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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