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An Investigation to determine changes of membrane permeability in beetroot cells.

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  • Essay length: 700 words
  • Submitted: 27/11/2003
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AS and A Level Molecules & Cells

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An Investigation to determine changes of membrane permeability in beetroot cells

Aim: To witness the changes of the solutions due to the release of coloured enzymes in the beetroot cells, in order to monitor the changes in membrane permeability. This would be done by, using a colorimeter tube to measure the amount of red colour that diffused out of the beetroot.

Hypothesis: Several pieces of beetroot of the same length are being tested at different temperatures to see, which beetroot will allow the most enzymes to diffuse out. Referring to the factors that affect the rate of diffusion it can be argued that the piece of beetroot undergoing the test at the highest temperature, which in this case is 80ºc would allow the chemicals to diffuse out of the beetroot faster than if they are tested at lower temperatures.

Since the beetroot is being tested at 80ºc, 60ºc, 40ºc, 20ºc and 5ºc the graph should show a gradual depreciation from the left side to the right.

The science that backs up this prediction is diffusion. The chemicals have to pass through the beetroots cell membrane. This happens at a constant rate but there are

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