A photograph of a plant cell is taken through a microscope. The real length of the cell is 90 micrometres. In the photograph the same cell is 27 mm long.
Calculate the magnification of the photograph.
A ribosome has a diameter of 0.000 000 02 m.
Write this diameter in standard form.
Explain why ribosomes cannot be seen using a light microscope.
139 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.