A-LevelBiologyCell structure9700/12 · May/June 2011 · Q11 Mark

Using a stage micrometer scale, one unit of an eyepiece graticule was calculated as 0.005 mm. The diameter of a spongy mesophyll cell was counted as 3.5 units on the eyepiece graticule. What is the estimate of the diameter of the cell?

A0.18 μm

B1.8 µm

C18.0 µm

D180 μm

✓ Correct answer

C: 18.0 µm

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Topic: Cell structure, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2011 Paper 1 Variant 2, question 1.

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