A scientist uses a transmission electron microscope to examine a fungal cell. Both structures are magnified by the same amount.
The scientist records the measurements in the table.
| Structure | Measured magnified width / mm\text{mm}mm | Actual width / μm\mu\text{m}μm |
|---|---|---|
| fungal cell | 54 | 18 |
| nucleus | 15 | unknown |
Calculate the actual width of the nucleus in μm\mu\text{m}μm.
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.