Measurements from a single-celled alga show that its volume is 48 μm348\ \mu\text{m}^348 μm3. Its surface area to volume ratio is 2.5:12.5:12.5:1.
What is the surface area of the cell?
1200 μm21200\ \mu\text{m}^21200 μm2
19.2 μm219.2\ \mu\text{m}^219.2 μm2
50.5 μm250.5\ \mu\text{m}^250.5 μm2
120 μm2120\ \mu\text{m}^2120 μm2
140 exam-style questions on AQA GCSE Biology 1.3 Transport in cells, covering 1.3.1 Diffusion, 1.3.2 Osmosis, and 1.3.3 Active transport. Each one has a worked solution and a mark scheme showing where the marks go.