A cell in the lining of the small intestine absorbs glucose from food in the gut. The surface of this cell that faces the gut is folded into many tiny projections. The cell also contains many mitochondria.
Explain how the folded surface adapts this cell to absorb glucose.
Glucose continues to be absorbed into this cell even when the concentration of glucose in the gut is lower than the concentration inside the cell.
Name the process responsible and explain why this process requires the cell's mitochondria.
163 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.