Aim: To investigate whether the temperature effects the production of yeast and hydrogen peroxide by measuring the oxygen gas given off for each temperature.

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Enzyme experiment

Aim: To investigate whether the temperature effects the production of yeast and hydrogen peroxide by measuring the oxygen gas given off for each temperature.

Catalysts are molecules which speed the rate reactions. Enzymes are biological catalyst which can be found in plants or animals. Catalase is an enzyme produced in the body to break down Hydrogen peroxide to produce oxygen and water (2H202 - 2H20+02 ).

Hypothesis: I predict that as temperature rises, then there will be more oxygen gas bubbles given off as all chemical reactions speed up as temperature is raised. This is partly due to more molecules have enough kinetic energy to undergo the reaction and also enzyme reactions also tend to proceed faster with increasing temperature.

However, when the temperature of an enzyme-catalyzed reaction is raised further, an optimum temperature will be reached so beyond this point, the kinetic energy of the enzyme and water molecules is so great that the structure of the enzyme molecules will start to disrupt. Enzymes will start to denature and this destroy the enzyme's ability as an active site.

Therefore, I predict that the optimum temperature of the reaction is