Insulin empowers the move of glucose into the cells, particularly in the liver and muscles, albeit different organs are likewise fit to metabolize glucose. In the liver and muscles, a large portion of the glucose is changed into glycogen by the methodology of glycogenesis (anabolism). Glycogen is put away in the liver and muscles until required at some later time when glucose levels are low All living cells need the energy to carry out various cellular activities. This energy is stored in the chemical bonds of fundamental molecules (e.g. carbohydrates, fats, proteins) that we eat as food. These fundamental molecules are broken down by enzymatic reactions in cells to generate energy in the form of adenosine triphosphate (ATP). The ATP generated by these pathways in cells is used to run fundamental cellular processes. The metabolic pathways are Glycolysis, Oxidation of Pyruvate, Citric Acid Cycle and Electron transport chain (ETC). The food we devour is mainly comprised of proteins, polysaccharides (carbohydrates) and fats. These are first confined into smaller units: proteins into amino acids, polysaccharides into sugars, and fats into fatty acids and glycerol. This process of digestion occurs outside the cell. The amino acids, simple sugars, and fatty acids then enter the cell and endure oxidation by glycolysis (in the cytosol) and the citric acid cycle (in the mitochondria) to generate ATP.