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An Experiment to Find the Effect of Altering pH on the Enzyme Activity of Catalase in Yeast. Null Hypothesis I Predict that there will not be a correlation between altering pH and amount of oxygen produced Alternative Hypothesis I predict that there will be a correlation between altering pH and enzyme activity. I expect my alternative hypothesis to be correct. I predict that increasing the acidity of the yeast solution will decrease the enzyme activity of catalase and therefore lower the rate of reaction and amount of oxygen produced. This is because an extreme pH can denature enzymes because in an acidic solution there is a high concentration of H+ ions. The H+ ions interfere with the active site and change the charge of the R-group of the enzyme. Once the Active site has been altered on an individual molecule of catalase, the substrate of hydrogen peroxide cannot bond with the active site and no decomposition...

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