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Carbohydrate Metabolism Most cells generate ATP and other high–energy compounds by breaking down carbohydrates–especially glucose. The complete catabolism of one molecule of glucose will provide a typical cell in the body with a net gain of 36 molecules of ATP. Although most of the actual ATP production occurs inside mitochondria, the first steps take place in the cytosol. Glycolysis is the breakdown of glucose to pyruvic acid (pyruvate). This anaerobic reaction sequence provides the cell with a net gain of two molecules of ATP for each glucose molecule converted to two pyruvic acid molecules.

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Carbohydrate Metabolism Most cells generate ATP and other high–energy compounds by breaking down carbohydrates–especially glucose. The complete catabolism of one molecule of glucose will provide a typical cell in the body with a net gain of 36 molecules of ATP. Although most of the actual ATP production occurs inside mitochondria, the first steps take place in the cytosol. Glycolysis is the breakdown of glucose to pyruvic acid (pyruvate). This anaerobic reaction sequence provides the cell with a net gain of two molecules of ATP for each glucose molecule converted to two pyruvic acid molecules.