One of the smallest viruses is the polio virus, which has a diameter of approximately 30 nm. In 2003, the Mimivirus was discovered which has a diameter of approximately 680 nm. In 2013, the Pandoravirus was discovered which has a diameter of approximately 1000 nm. Which row correctly matches a cell structure with a virus that has a similar approximate size? [Figure 2.1 - table comparing cell structures with virus sizes]
✓ Correct Answer
The correct answer is D: polio virus: ribosome, Mimivirus: lysosome, Pandoravirus: mitochondrion
📋 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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