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Investigate how the concentration of the substrate hydrogen peroxide (H2O2) affects the rate of reaction of the enzyme catalase in yeast cells.
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Introduction Enzymes were discovered be Edward Buncher towards the 19th century. Enzymes such as catalase are globular protein molecules found in all living cells. They are biological catalysts, which are used to speed up a reaction rate within the cell. They reduce the level of activation energy needed in a reaction, increasing the rate of reaction by doing that. The higher the activation energy, the slower the reaction is going to be. Figure 1, below shows the amount of activation energy needed with and without an enzyme. Figure 1: The activation energy of a reaction is smaller than in the presence of an enzyme Enzyme-substrate complex An area on the surface of an enzyme is known as the active site. The substance that the enzyme acts on is called the substrate. The substrate fits into the active site (shapes fit together); therefore their shapes are complimentary to each other. Each enzyme has a...
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