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The aim for this experiment is to find which sugar respires best with yeast.
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| Submitted: Tue Aug 19 2003
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Aim The aim for this experiment is to find which sugar respires best with yeast. Hypothesis I think glucose will respire best (produce the most Carbon Dioxide) and Arabinose will react least. This is because Glucose 'fits' exactly into the yeast enzyme according to the 'lock and key' theory. Because the Glucose molecule 'fits' in the yeast exactly, it metabolises the best. Sugar molecules, such as Galactose, which is similar to Glucose, may partially react as the substrate may partially 'fit' into the yeast active site, however, it will not fully react as it will not fully fit into the yeast active site. According to the Swedish chemist Savante Arrhenius, the substrate and enzyme form an intermediate substance known as the enzyme substrate complex: S + E --> ES --> P + E Substrate Enzyme Enzyme Substrate Complex Product Enzyme So, if the substrate does not react completely with the enzyme, a 'good' enzyme substrate complex will not be created, so a 'good' product will not be created. Equipment list Conical Flasks Beakers Pipettes Measuring...
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