Glycolysis cycle: Cellular respiration is a metabolic pathway

Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP. The stages of cellular respiration include glycolysis , pyruvate oxidation, the citric acid or Krebs cycle , and oxidative phosphorylation. The Krebs cycle occurs in the mitochondrial matrix, where pyruvate is turned into acetyl-CoA, which then goes through a series of reactions, producing ATP, NADH, and FADH2. How pyruvate from glycolysis is converted to acetyl CoA so it can enter the citric acid cycle . Pyruvate is modified by removal of a carboxyl group followed by oxidation, and then attached to Coenzyme A. Glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism. Glycolysis consists of an energy-requiring phase followed by an energy-releasing phase.