Introduction: Cellular Respiration is the process of oxidizing food molecules, like glucose, to carbon dioxide and water. The energy released is trapped in the form of ATP for use by all the energy-consuming activities of the cell. This occurs in three phases: glycolysis, the Kreb’s cycle and oxidative phosphorylation. When measuring consumption of oxygen during the oxidation of glucose, respirometers are used. Respirometers are devices that measure these types of gas volume changes, and therefore provide information about the rate of cellular respiration. Cellular respiration requires a nutrient molecule such as glucose and oxygen. The equation: shows this. Glycolysis is the first step which produces
…show more content…
Glycolysis also results in the production of 2 NADH molecules, which eventually play an important role in the production of additional ATP in the electron transport chain. Glycolysis itself is an anaerobic process. After a cell has completed glycolysis, and depending on the circumstances in which the cell finds itself, that cell can either move into the process of aerobic respiration and commence the citric acid cycle or continue with fermentation if there is no oxygen available. When oxygen is present, the pyruvate moves out of the cytosol in which glycolysis took place and crosses the membrane into the matrix of the mitochondria. There, before entering the citric acid cycle, the pyruvate undergoes a transition stage, in which the two pyruvates are converted into two acetyl-coenzyme A (acetyl-CoA), two carbon dioxide molecules, and two NADH. Then, during the series of eight reactions that make up the citric acid cycle, the two acetyl-coA molecules are oxidized, yielding two more molecules of carbon dioxide and 2
Glycolysis also results in the production of 2 NADH molecules, which eventually play an important role in the production of additional ATP in the electron transport chain. Glycolysis itself is an anaerobic process. After a cell has completed glycolysis, and depending on the circumstances in which the cell finds itself, that cell can either move into the process of aerobic respiration and commence the citric acid cycle or continue with fermentation if there is no oxygen available. When oxygen is present, the pyruvate moves out of the cytosol in which glycolysis took place and crosses the membrane into the matrix of the mitochondria. There, before entering the citric acid cycle, the pyruvate undergoes a transition stage, in which the two pyruvates are converted into two acetyl-coenzyme A (acetyl-CoA), two carbon dioxide molecules, and two NADH. Then, during the series of eight reactions that make up the citric acid cycle, the two acetyl-coA molecules are oxidized, yielding two more molecules of carbon dioxide and 2