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James Fung 21stDecember,2002 Biology Investigation --- the effects of temperature on the rate of action of amylase Result: Temperature /(x) Time taken to break down starch /mins 1 2 3 4 5 Average (y) 0 20+ 20+ 20+ 20+ 20+ 20+ 20 14 11 18 12 11 13.2 40 6 7 5 4 7 5.8 60 20+ 18 20+ 17 19 18.8 80 20+ 20+ 20+ 20+ 20+ 20+ 100 20+ 20+ 20+ 20+ 20+ 20+ See Fig.1 * 20+ means the time taken for amylase to break down starch is more than 20 minutes and the actual time was not recorded Analysis: To analyse the results obtained, I have calculated their averages, as shown on the table above. Then I have drawn them out as scatter diagram in Fig.1 with straight lines joining the dots together. The graph shows that the average time taken for amylase to break down starch neither decreases nor increases the whole way through from 0 to 100. It gives a sort of parabola curve. When I looked closely to the biology behind what the curve shows, I found a reason for this. To understand what had happened, the knowledge of enzyme has to be known. Enzyme is a...

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