A cell has a mass of 2.4 × 10-12 g. All cells in a sample have this mass.
The total mass of the cells in the sample is 7.2 × 10-6 g.
How many cells would be present in one-quarter of this well-mixed sample?
7.5×1057.5\times10^{5}7.5×105
3.0×1063.0\times10^{6}3.0×106
1.2×1071.2\times10^{7}1.2×107
7.5×1067.5\times10^{6}7.5×106
48 exam-style questions on Edexcel GCSE Biology 1.2 Number, size and scale, covering 1.2.1 Number, size and scale with estimations and 1.2.2 Quantitative units in relation to cells. Each one has a worked solution and a mark scheme showing where the marks go.