A printed micrograph has a scale bar. The measurements are shown in the table.
| Measurement | Value |
|---|---|
| Length of the scale bar on the printed micrograph | 8 mm |
| Actual length represented by the scale bar | 40 μm40\ \mu\text{m}40 μm |
| Length of a cell on the printed micrograph | 12 mm |
Calculate the actual length of the cell in the micrograph.
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.