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Design an experiment to investigate the effect of temperature on the movement of a pigment through a membrane
Member rating: No Rating | Words: 7165 | Submitted: Mon Feb 25 2008
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Design an experiment to investigate the effect of temperature on the movement of a pigment through a membrane Hypothesis The tonoplast is the membrane that separates the vacuole from the rest of the cell. The membrane is selectively permeable and a phospholipid bilayer. The membrane is made up of phospholipids, which have a phosphate group and two fatty acid tails. The phosphate group is polar and hydrophilic, whereas the fatty acid tails are non-polar and hydrophobic. The fatty acid tails therefore try to get as far away as they can from the watery fluid in the vacuole and the watery cytoplasm, so the fatty acid tails point inwards and the phosphate heads point outwards. Also in the bilayer there are proteins, which can be intrinsic or extrinsic. Intrinsic proteins are proteins that span the full width of the membrane, whereas extrinsic proteins only go a small way into the membrane. The proteins...
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