A-LevelBiologyCell structureOct/Nov 2019Paper 1 Q21 Mark
The diameter of living cells varies considerably. The diameter of a typical eukaryotic cell is 1.5 × 10¹ μm. The diameter of a typical prokaryotic cell is 7.5 × 10² nm. Using these measurements, what is 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 10⁴ | 1.3 x 10²
B6.7 x 10³ | 1.3 x 10⁵
C6.7 x 10² | 1.3 x 10⁴
D6.7 x 10¹ | 1.3 x 10³
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The correct answer is C. This question tests the candidate's understanding of cell structure within the Biologysyllabus. The examiner's mark scheme requires...
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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...
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