A cell has a real diameter of 0.000 012 m. What is this diameter written in standard form?
1.2×10−41.2 \times 10^{-4}1.2×10−4 m
1.2×10−51.2 \times 10^{-5}1.2×10−5 m
12×10−612 \times 10^{-6}12×10−6 m
1.2×1051.2 \times 10^51.2×105 m
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.