Movent molecules 4.5 / 5 based on 4 ratings ? BiologyDiffusionGCSEAQA Created by: caitlincannonCreated on: 12-02-14 12:56 512634 Across 1. Molecules move from a high concentration gradient to a ..... concentration gradient (3) 3. Diffusion allows substances to pass into or out of cells across the cell membrane - but they must be dissolved and there must be a concentration...? (8) 4. Active transport requires protein...? (8) Down 2. Osmosis is..? (5) 5. Active transport requires....? (6) 6. what does diffusion not require? (6)
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