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The effect of temperature on membrane structure
Member rating: No Rating | Words: | Submitted: Tue Oct 17 2006
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The effect of temperature on membrane structure. The purpose of my experiment is to use beetroot to investigate the effect of temperature on cell membranes and relate the effects to membrane structure. Background Knowledge The cell membrane is a boundary between the cell and its surroundings. It plays a vital role in regulating materials passing in and out of the cell. The fluid mosaic model of a cell membrane is an asymmetrical mosaic of lipids and proteins, first proposed in 1972. A cell surface membrane has a phospholipid bilayer. This is two layers of lipid molecules held together. The phosphate head of the molecule is polar, meaning the electron sharing between it is not equal and that it is slightly positive or negative. The polar heads attract other polar molecules like water and are hydrophilic (water attracting); the tails of these lipids are non polar and are therefore are hydrophobic (water repelling). The...
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