A light microscope can distinguish between two points that are 200 nm200\ \text{nm}200 nm apart. A transmission electron microscope can distinguish between two points that are 0.2 nm0.2\ \text{nm}0.2 nm apart.
The table shows the sizes of four structures in an animal cell.
Table
| Structure | Size |
|---|---|
| Nucleus | 6 μm6\ \mu\text{m}6 μm diameter |
| Mitochondrion | 1 μm1\ \mu\text{m}1 μm length |
| Ribosome | 25 nm25\ \text{nm}25 nm diameter |
| Cell membrane | 7 nm7\ \text{nm}7 nm thickness |
Which two measurements could be made using the transmission electron microscope but not the light microscope?
nucleus diameter and mitochondrion length
mitochondrion length and ribosome diameter
nucleus diameter and cell membrane thickness
ribosome diameter and cell membrane thickness
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.