KINS 1224 Chapter Notes - Chapter 26: Lactic Acid, Cellular Respiration, Citric Acid Cycle
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10 Apr 2016
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There are 3 major pathways of glucose catabolism: Glycolysis- splits a glucose molecule into 2 molecules of pyruvic acid. Anaerobic fermentation- occurs in the absence of oxygen and reduces pyruvic acid to lactic acid. Aerobic respiration- which occurs in the presence of oxygen and oxidizes pyruvic acid to carbon dioxide to water. Carbohydrates are transformed into glucose. glycolysis can split into anaerobic fermentation if there is no oxygen and aerobic respiration if oxygen is present. Phosphorylation-the enzyme hexokinase transfers an inorganic phase group from atp to glucose producing glucose 6- phosphate (g6p). Priming- g6p is rearranged to form fructose phosphate which is phosphorylated again to form fructose 1,6-diphosphate. Aerobic respiration eventually gives back far more atp than it takes to prime glycolysis. Cleavage- the lysis part of glycolysis occurs when fructose 1,6-diphosphate splits into 2 3-carbon molecules. This generates 2 molecules of pgal(phosphoglyceraldehyde, also called glyceraldehyde 3- phosphate)
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