A student uses a light microscope to look at different cells. She draws each cell and measures the length of each drawing.
The Table shows her results.
Table
| Cell | Length of drawing in mm\text{mm}mm | Real length in μm\mu\text{m}μm | Magnification of drawing |
|---|---|---|---|
| red blood cell | 32 | 8 | |
| cheek cell | 60 | 60 | ×1000\times 1000×1000 |
| onion cell | 75 | ×250\times 250×250 |
Calculate the magnification of the drawing of the red blood cell.
Calculate the real length of the onion cell.
Give your answer in μm\mu\text{m}μm.
Write the three cells in order of real length, from the shortest to the longest.
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.