A scientist wants to carry out two investigations on leaf cells.
Investigation 1: watch how chloroplasts move around inside living leaf cells.
Investigation 2: find out the shape of the ribosomes in leaf cells.
A chloroplast is about 5 μm5\ \mu\text{m}5 μm long. A ribosome is about 25 nm25\ \text{nm}25 nm wide.
The Table shows information about two types of microscope.
Table
| Feature | Light microscope | Transmission electron microscope |
|---|---|---|
| Maximum useful magnification | ×1500\times 1500×1500 | ×2 000 000\times 2\,000\,000×2000000 |
| Resolution in nm\text{nm}nm | 200 | 0.2 |
| Can be used with living specimens | yes | no |
| Approximate cost in £ | 500 | 1 000 0001\,000\,0001000000 |
| Type of image | colour | black and white |
Evaluate which type of microscope the scientist should use for each investigation.
Use information from the Table in your answer.
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.