A student investigates osmosis using potato cylinders. Each cylinder is weighed before and after being left in a sugar solution.
Why should the student gently blot each cylinder before weighing it?
to remove the sugar stored inside the cells
to remove the water stored inside the cells
to remove the cell walls surrounding the cells
to remove the solution remaining on the surface
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.