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Enzyme Investigation - Amylase Plan I am going to investigate the effects of four different concentration of amylase solution on the breakdown of starch. I have chosen amylase because enzymes act on one particular substance or groups of substances i.e. they have a specific function. The shape of the molecule, especially the active site is linked with this specificity. A simple way of explaining this specificity is in terms of the lock and key hypotheses. The shape of the active site matches the shape of the substrate molecule so the substrate can fit into the active site and amylase can react and breakdown starch. According to Susan Toole, 'Advance Human and Social Biology', 'the active site of an enzyme may be used again and again. Enzymes therefore work efficiently at very low concentrations. The number of substrate molecules which an enzyme can act upon in a given time is called its turnover...

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