Cellular Respiration

Cellular Respiration

The process by which food molecules are processed and converted into energy (ATP) is cellular respiration. Plants and animals use cellular respiration. This process can be divided into four main metabolic stages. The first process that occurs is glycolysis. This occurs in the cytosol and without the presence of oxygen. 2 ATP and NADH molecules are produced. The second stage is where pyruvate is decarboxylated, grouped with CoA, and thus forming a link between this and the next stage, the Krebs cycle. Catalyzed by enzymes, the Krebs cycle begins and occurs with the presence of oxygen. Ending result: 4 carbon dioxide molecules, 6 NADH molecules, 2 ATP molecules, and 2 FADH2 molecules. The last stage, the electron transport chain, creates 34 ATP. In result the plant obtains energy from the glucose molecules


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