A-LevelBiologyCell structureOct/Nov 2010Paper 1 Q41 Mark
The diameter of living cells varies considerably. The typical diameters are a eukaryote, such as a white blood cell 1.5 × 10¹ μm a prokaryote, such as Streptococcus 7.5 x 10² nm Use these measurements to find the maximum number of each cell type which could fit along a line 1 cm long. number of white blood cells number of Streptococcus cells
A6.7 x 10³ 1.3 x 10⁵
B6.7 x 10² 1.3 x 10⁴
C6.7 x 10¹ 1.3 x 10³
D6.7 x 10⁰ 1.3 x 10²
✓ Correct Answer
The correct answer is B: 6.7 x 10² 1.3 x 10⁴
📋 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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