The Oxidation Of Organic Fuels Yields Energy Essay

920 Words 4 Pages
Cellular Respiration The oxidation of organic fuels yields energy to be used by the cell. Cells break down molecules such as glucose to yield chemical energy in the form of ATP. The process of fermentation can partially break down glucose without using any oxygen. Aerobic respiration is the most efficient way to break down glucose molecules for ATP. When glucose and oxygen react during aerobic respiration, the glucose molecule looses electrons, while the oxygen molecule gains them. The two reactants then yield carbon dioxide, water, and energy. This is an example of a redox reaction, in which one substance gives some or all of its electrons to another. Oxidation is the part of the reaction where the substance looses electrons, while reduction is the addition of electrons. Reduction can be simply thought of as making a substance more electro-negative with the addition of electrons. Aerobic respiration is common in eukaryotes, and takes place at various locations, but mostly in the mitochondria. The three major process of aerobic respiration are glycolysis, pyruvate oxidation and the citric acid cycle, and oxidative phosphorylation. During aerobic respiration, glucose is oxidized to form carbon dioxide, and the oxygen molecule is reduced to make water. The process of cellular respiration causes the electrons transferred from the organic molecule (in this case glucose) to oxygen to lose potential energy. The energy lost from reactant to product is taken by NAD+, reducing…

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