Practise Edexcel GCSE Biology 1.4 Transport across cell membranes with exam-style questions for Foundation and Higher tier. 62 questions covering 1.4.1 Transport into and out of cells and 1.4.2 Percentage gain and loss in osmosis, matched to the Edexcel GCSE Biology (1BI0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.