An Overview of Metabolism and Biochemical Energy Fats Carbohydrates Proteins Catabolic pathways Stage 1 Bulk food is hydrolyzed in the for the degradation stomach and small intestine Hydrolysis Hydrolysis Hydrolysis to give small molecules. of food and the Fatty acids, Glucose,fructose,other Amino acids glycerol monosaccharides production of biochemical energy Stage 2 Fatty acids,monosaccharides and amino acids are degraded in cells to yield acetyl CoA. Stage 3 Acetyl CoA is oxidized in the citric acid cycle to give CO2. Citrie acid cycle Stage 4 The energy released in the Electron citric acid cycle is used by the transport electron-transport chain to chain oxidatively phosphorylate ADP and produce ATP ATP H2O Catabolic pathways for the degradation of food and the production of biochemical energy An Overview of Metabolism and Biochemical Energy