Substances move into and out of cells by diffusion, by osmosis and by active transport.
Give the meaning of the term 'active transport'.
Name the sub-cellular structure that releases the energy needed for active transport.
Root hair cells absorb mineral ions from the soil.
Explain why root hair cells cannot absorb these mineral ions by diffusion.
Give one reason why a plant needs mineral ions.
58 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.