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Effect of Temperature on the rate of respiration Introduction Respiration is the chemical process used by all living organisms to liberate energy in order to create ATP, Adenosine triphosphate, from food, usually glucose. When oxygen is used during the reaction it is termed aerobic respiration and when oxygen is not available it is known as anaerobic respiration. In aerobic respiration approximately 36 ATP molecules are produced and the pyruvate made during glycolysis is completely oxidised to form water and carbon dioxide. Anaerobic respiration is less efficient and only produces two ATP molecules and also uses the pyruvate by converting it, using a process of fermentation, into ethanol and carbon dioxide. Yeasts belong to the kingdom Fungi and are unicellular organisms that reproduce asexually. Yeasts are termed facultative anaerobes because of their ability to respire with or without oxygen. It is possible to view the process of respiration in yeast by placing a...

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