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1.1 Cell structures

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Question 19

A micrograph of a plant leaf section shows stomata at a magnification of ×400\times 400×400. The measured length of one of the guard cells in this image is 7.2 mm7.2\text{ mm}7.2 mm. Calculate the actual length of this guard cell in micrometres (μm\mu\text{m}μm). Note: 1 mm=1000 μm1\text{ mm} = 1000\ \mu\text{m}1 mm=1000 μm.

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Markscheme

1.1 Cell structures Questions

  1. GCSE
  2. /Biology
  3. /1.1 Cell structures

40 exam-style questions on OCR GCSE Biology 1.1 Cell structures, covering 1.1.1 Viewing cells with light microscopes, 1.1.2 Sub-cellular structures and functions, and 1.1.3 Electron microscopy and resolution. Each one has a worked solution and a mark scheme showing where the marks go.

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