Three potato cylinders are left in the same sugar solution. Their percentage changes in mass are -8%, -10% and -12%. Only water crosses the cell membranes.
Which option gives the mean percentage change and the net movement responsible?
−10%-10\%−10%; water moves into the cells
−30%-30\%−30%; water moves out of the cells
−10%-10\%−10%; water moves out of the cells
−30%-30\%−30%; water moves into the cells
41 exam-style questions on Edexcel GCSE Biology 1.4 Transport across cell membranes, covering 1.4.1 Transport into and out of cells and 1.4.2 Percentage gain and loss in osmosis. Each one has a worked solution and a mark scheme showing where the marks go.