Cells lining a kidney tubule reabsorb glucose from the fluid in the tubule. Glucose enters the cells even when its concentration is higher inside the cells than in the fluid.
Scientists compared several samples of these cells.
Which additional observation would provide the strongest evidence that the glucose is moved by active transport?
Samples with faster glucose uptake also have more water entering the cells by osmosis.
Samples with faster glucose uptake have cells with a larger membrane surface area.
Samples with faster glucose uptake have cells containing more mitochondria.
Glucose uptake is faster when there is a greater difference in glucose concentration.
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.