Essay about Permeability of Beetroot Cell Membranes

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Permeability of Beetroot Cell Membranes

An experiment to investigate how temperature affects the

Permeability of beetroot cell membranes

Interpretation of Results:



From 0°C to 30°C there is a gradual increase of absorbency which shows that as the temperature increases it is denaturing the cell wall and cell membrane and allowing the beetroot pigment to leek out into the distilled water.

As soon as the sample of beetroot is placed into the distilled water diffusion occurs naturally, which is the net movement of molecules from a region of high concentration (beetroot sample) to a region of low concentration (distilled water).

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Within my data which I collected I have found one anomaly. The anomaly is taken from my second row of results (highlighted in red).

At the temperature 40°C, the first result I collected from this temperature was 0.75 arbitrary units and from the re-test results at the same temperature I got 0.41 arbitrary units. This is a difference of 0.34 arbitrary units.

This piece of data is not what I would have expected due to the first set of results, although the data at 55°C on the first and second tests are relatively the same.

Evaluation of Practical Work:

The anomaly which I have identified at 40°C is 0.41 arbitrary units this could be due to the size of the sample of beetroot used, if the sample was smaller than the other samples it was have less pigment which would suggested why the result is lower than expected. Another suggestion for why the result is lower than expected could be due to the loss of pigment in the preparation process, or from where the sample was taken from on the beetroot.

If the sample was taken from the centre of the beetroot the sample may have had more pigment contained within the cells, but if the sample was taken from closer to the surface of the beetroot it
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