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Investigation into the alcohol fermentation of yeast Aim: To find out about the products of alcoholic fermentation. We are trying to see if yeast can respire anaerobically at different temperatures. Before I begin the experiment i am going to explain the main facts of this study. Background information: Aerobic respiration is when something respires with air, whereas, anaerobic respiration is when something respires without air. Most organisms will die without oxygen but in some cases, glucose may still be broken down and energy transferred. Alcoholic fermentation is another way to respire anaerobically and involves converting glucose into alcohol. The formula for anaerobic respiration is: glucose + alcohol carbon dioxide + energy As with aerobic respiration, carbon dioxide gas is given off. Alcoholic fermentation is far less efficient at giving energy than aerobic respiration. When one mole (180g) of glucose is respired aerobically, 2880kJ of energy are transferred. The equivalent figure...

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