The Three Main Stages Of Cellular Respiration

are three main stages of cellular respiration are glycolysis, the citric acid cycle, and electron transport/oxidative phosphorylation. Enzymes play a role in cellular respiration. Enzymes are proteins that catalyze or affect the rate of chemical reactions. The main purpose of enzymes in cellular respiration is to help in transporting electrons from one molecule to another. These transfers are called redox reactions. Where the loss of electrons from one molecule oxidation must correspond with more electrons to another substance known as reduction. Factors that would affect enzymes would be PH, temperature, enzyme concentration, substrate concentration. Glycolysis is the first step in cellular respiration and it means split in two. Glucose is
In the end of glycolysis, it gets converted into two molecules of pyruvate a three-carbon organic molecule. In these responses ATP is produced and NAD+ is converted to NADH. The results of Glycolysis are energy is required for the startup of glycolysis to split the glucose molecule into two pyruvate molecules. These two molecules go onto stage two of cellular respiration. Two molecules of ATP produce the energy to split glucose. As glycolysis proceeds it releases energy and the energy is used to produce four molecules of ATP, resulting in a gain of two ATP molecules. Also, high energy electrons are transferred to NAD+, producing two NAD also another energy production. The second step is pyruvate oxidation. Each pyruvate from glucose goes to the inner most spot in matrix of the mitochondria. In the mitochondria pyruvate is converted into a two-carbon molecule bound to coenzyme. Then carbon dioxide is released and NADH is produced. A coenzyme is a nonprotein compound that is necessary for the functioning of an enzyme. The third step is citric acid cycle or the Krebs cycle. The acetyl CoA made in step two comes together with a four-carbon molecule and goes through a cycle of