Glucose is absorbed from the small intestine into the blood. In which situation must active transport be used to absorb the glucose?
The concentration of glucose is higher in the blood than in the small intestine
The concentration of glucose is higher in the small intestine than in the blood
The concentration of glucose is rising in the blood and in the small intestine
The concentration of glucose is falling in the blood and in the small intestine
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.