A student prints a microscope image of a human cheek cell. The real width of the cheek cell is 45 micrometres.
| Measurement on the printed image | Length in mm |
|---|---|
| Width of the cheek cell | 75 |
| Scale bar | 12 |
What real length does the scale bar represent?
281.25 micrometres
540 micrometres
0.6 micrometres
7.2 micrometres
282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.