Required Practicals 3 and 11, Dilution Series and Calibration Curves: AQA A Level Biology Exam Questions by Topic
Thirteen real AQA exam questions on required practicals 3 and 11, making a dilution series and using a calibration curve to find water potential or concentration, each with its mark scheme and advice from the examiners' reports.
Transport Across Cell Membranes: AQA A Level Biology Exam Questions by Topic
Eighteen real AQA exam questions on transport across cell membranes, from the fluid-mosaic model and diffusion to osmosis, active transport and co-transport in the ileum, each with its mark scheme and advice from the examiners' reports.