A-LevelBiologyCell structureMay/June 2010Paper 1 Q161 Mark
Which structures are measured using these units?
A10⁻³ m: chloroplast; 10⁻⁶ m: ribosome; 10⁻⁹ m: nucleus
B10⁻³ m: nucleus; 10⁻⁶ m: chloroplast; 10⁻⁹ m: xylem vessel
C10⁻³ m: ribosome; 10⁻⁶ m: xylem vessel; 10⁻⁹ m: chloroplast
D10⁻³ m: xylem vessel; 10⁻⁶ m: nucleus; 10⁻⁹ m: ribosome
✓ Correct Answer
The correct answer is D: 10⁻³ m: xylem vessel; 10⁻⁶ m: nucleus; 10⁻⁹ m: ribosome
📋 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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