Biology Coursework On Beetroot

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Analysis: Graph 1 shows my initial results and their averages for temperatures 10o C, 20o C, 40o C and 60o C.

The general trend of the graph looks like a linear negative correlation between temperature and light transmission as a percentage.

There will also be the same number of disks per boiling tube, 3 disks, to increase the surface area. Middle - Record results for each test in the results table. Clean apparatus and repeat the experiment changing the temperature to all specified temperatures - just above 0o C, 20o C, 40o C, 60o C or 80o C - and making sure the same volumes, equipment and method is used.

At the end of the experiment there should be 18 light transmission percentage recordings (3 test tubes x 5 temperatures) and 5 average results.

This makes me come to the conclusion that the results are inaccurate and the experiment should be retaken.

The readings for 60o C (3%, 2%, 2%) were extremely low.

An increase in temperature results in an increase of the red pigment release, this could be down to the structure of the beetroot cells' membrane which is a phospholipid bilayer.

The temperature affects the H-bonds within the bilayer and the protein pores.

The 10o C temperature point was retaken and the results complied.

This error is very hard to avoid because it is an electronic piece of apparatus, therefore several results should be taken for every test tube.


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