Cell Membranes 2.0 / 5 based on 1 rating ? BiologyCellular processes and structureASEdexcel Created by: Charlotte O'DwyerCreated on: 26-01-14 18:58 What proves that the cell membrane has two different responses to water? Phospholipids are polar with a hydrophilic head and a hydrophobic tail 1 of 6 What suggests the phospholipid bilayer structure? When put in water, the phospholipids form bilayers with tails inside and heads outside. Furthermore the 2 of 6 What proves the mosaic part of the cell membrane structure? In electron microscope images of cell surfaces, proteins can be seen sticking out 3 of 6 What proves that carbohydrates are only found on the outside of the membrane? When lectins (which only react with carbohydrates) are added to a membrane they are found only on the outside 4 of 6 What proves that proteins acts as channels for movement in the membrane? Some water-soluble substances pass into and out of cells 5 of 6 What proves that membranes are mainly made of lipids? Ionic and polar molecules do not pass easily through membranes, but lipid-soluble substances do 6 of 6
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