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Effect of Temperature on Beetroot Membrane Proteins Planning A - Independent Variable The independent variable in this experiment will be the temperature. I will control this factor using thermostatically controlled water baths, and a thermometer. The temperatures at which the beetroot cubes will be tested will be 0° (ice), 20°C (room temperature), 40°C, 60°C and 80°C. B - Dependent Variable The dependant variable is the result - this experiment will initially yield qualitative results. This is not desirable as it is only approximate and as it is not viable to use it to plot graphs of the results. Therefore, the results will be converted from qualitative to quantitative using a colorimeter, which will measure the percentage light transmission through the different temperatures after the beetroot has been left in the boiling tubes for 5 minutes. A blue filter will be used to measure the redness of the solutions, as it is a complimentary colour. The experiment...

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