A potato cylinder is placed in a sugar solution. Its mass initially decreases and later becomes constant. Sugar cannot cross the cell membranes, but water can.
Which statement explains how the initial loss of water contributes to the mass becoming constant?
it dilutes the cell contents and increases the difference in water concentration
it concentrates the cell contents and increases the difference in water concentration
it concentrates the cell contents and reduces the difference in water concentration
it dilutes the cell contents and reduces the difference in water concentration
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.