Principles amd Biochemistry with a Human Focus. Tonya Darghali. If the organism does not need more energy, then it is best to divert those metabolites towards storage or other necessary processes. Purpose: To review and reinforce Carbbohydrate knowledge of the reactions of glycolysis, gluconeogenesis, the pentose phosphate Endurance nutrition plans and Crbohydrate tricarboxylic acid Krebs gluconeogendsis, as well Carbohydrate metabolism and gluconeogenesis pathway Antioxidant superstars about some vitamin-coenzyme connections. Bottom Line: Glycolysis is an ancient energy-generating pathway used by essentially all cells. Glycolysis generates a small amount of energy, and provides the entry point for the pyruvate dehydrogenase reaction and the TCA cycle. For a good summary of the glycolytic pathway, check Devlin, Figure Please note the structuring into the three stages: a Priming stage; b Splitting stage; c Oxidoreduction—phosphorylation stage. Phosphorylation of glucose and conversion to phosphorylated fructose. This stage requires energy in the form of ATP.