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Respiration in Yeast I am looking at yeast to find the optimum conditions for it to produce more alcohol and carbon dioxide as waste products from breaking down glucose during anaerobic respiration. Planning There are many factors (variables) that could affect my investigation such as the temperature the yeast respires at as at different temperatures the enzymes in yeast work faster or slower at breaking down the glucose. The amount of yeast will also have an effect on the results, as if we are to use different amounts in each experiment it will form an unfair test. Another factor that could affect our investigation is the percentage of glucose in the yeast. I must also make sure to leave all experiments undisturbed during the course of respiring, this means they cannot be stirred or let air get to them. I have chosen to investigate the affect the % concentration of glucose has on the...

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