Identical potato cylinders are placed in solutions P and Q for the same time. The cylinders in P gain mass. The cylinders in Q lose mass. Only water crosses the cell membranes during the investigation.
Which statement explains these results?
P is more concentrated than the cell contents; Q is less concentrated
P and Q are both more concentrated than the cell contents
P is less concentrated than the cell contents; Q is more concentrated
P and Q are both less concentrated than the cell contents
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.