Cellular Respiration And The Production Of Adenosine Triphosphate ( Atp )

1283 Words Nov 30th, 2015 null Page
Respiration is the process by which organisms burn food to produce energy. We all need energy to function and we get this energy from the foods we eat. This is the most efficient way for cells to harvest energy, resulting in the production of adenosine triphosphate (ATP). ATP, a high energy molecule, is expended by working cells. Cellular respiration occurs in both eukaryotic and prokaryotic cells and is essential for daily living. The ultimate goal of cellular respiration is to take carbohydrates, disassemble them into glucose molecules, and then use this glucose to produce energy-rich ATP molecules. The general equation for cellular respiration is: one glucose molecule plus six oxygen molecules produces six carbon dioxide molecules, six water molecules, and approximately 36-38 molecules of ATP. There are three main stages of cellular respiration: glycolysis, the citric acid cycle, and electron transport.
Glycolysis is the first stage of respiration. It takes place in the cytoplasm of the cell. In glycolysis, ATP is used to split glucose molecules into a three-carbon compound called pyruvate. In the process, two molecules of ATP, two molecules of pyruvic acid, and two electron carrying molecules of NADH are produced. Glycolysis can occur with or without oxygen. In the presence of oxygen, glycolysis is the first stage of cellular respiration. Without oxygen, glycolysis allows cells to make small amounts of ATP. This process is called fermentation. The reactions of glycolysis…

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