A drawing of a cell is 60 mm wide. Next to the drawing is a scale bar that is 10 mm long and is labelled 5 micrometres. What is the real width of the cell?
0.3 micrometres
3.0 micrometres
30 micrometres
300 micrometres
163 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.