A student measures a cell and the scale bar on the same micrograph. The measurements are shown in the table.
| Feature | Length on micrograph | Actual length |
|---|---|---|
| Scale bar | 8 mm | 40 μm40\ \mu\text{m}40 μm |
| Cell | 5 mm |
Calculate the actual length of the cell.
130 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.