A-LevelBiologyCell structure9700/12 · Oct/Nov 2022 · Q11 Mark

The diagram shows a stage micrometer, with divisions 0.10mm apart, viewed through an eyepiece containing a graticule. [Diagram] The area of the field of view of the microscope can be calculated using this formula. area = πr² A student calculated the area of the field of view of the microscope using the information provided and a value for π of 3.142. Which answer has been rounded correctly to an appropriate number of significant figures?

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A0.04909 mm²

B5 × 10-² mm²

C4.909 × 104 µm²

D4.91 × 104 µm²

✓ Correct answer

D: 4.91 × 104 µm²

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Topic: Cell structure, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2022 Paper 1 Variant 2, question 1.

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