A cell is treated with a chemical that stops all respiration in the cell. Immediately afterwards, oxygen still diffuses into the cell. Which statement explains this observation?
Diffusion is a passive process, so it does not need energy from respiration.
Diffusion is an active process, so it does not need energy from respiration.
Diffusion is a passive process, so it needs energy released by respiration.
Diffusion is an active process, so it needs energy released by respiration.
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.