A typical eukaryotic epithelial cell has a diameter of 30 μm30\ \mu\text{m}30 μm, while a typical adenovirus particle has a diameter of 30 nm30\ \text{nm}30 nm.
What is the order of magnitude difference between the diameter of the epithelial cell and the diameter of the adenovirus particle?
222
333
444
666
40 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.