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Manpreet Virdee Aim This investigation aims to determine what effect an increase in the surrounding temperature has on the plasma membrane of a typical plant cell structure. Hypothesis An increase in temperature will damage and denature the plasma membrane, which would cause the substances contained within the cytoplasm to leak out of the membrane. The investigation, which was carried out, was to see the "effect of temperature on membrane permeability". Different temperatures were used ranging from room temperature to 87 C. Three test tubes were used to give a range of results. They were placed in a colorimeter, and a percentage was recorded that showed how much light has passed through. The following will show a table of the results obtained from the investigation. A mean of the results will be calculated. Temperature (C) Test tube 1 (%) Test tube 2 (%) Test tube 3 (%) Mean (%) 23 98 96 96 96.67 45 95 93 91 93.00 53 74 73 73 73.33 65 54 45 34 44.33 87 1 1 1 1 From the above results it can be seen that as the...

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