Aerobic Resperation
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- Hi I am Morgan Freeman, today I will be discussing the process of aerobic cellular respiration. The first step of aerobic respiration is Glycolysis which is a series of reactions that extract energy from glucose by splitting it into two three-carbon molecules called pyruvate. It also produces two ATP, NADH and water. Glycolysis takes place in the cytoplasm of the cell and does not require oxygen.
- The second step of aerobic cellular respiration is the Krebs Cycle. The Krebs Cycle is the common pathway for complete oxidation of carbohydrates, proteins and lipids as they are metabolized to acetyl coenzyme A or other intermediates of the cycle. The Acetyl CoA produced enters the Tricarboxylic acid cycle or Citric acid cycle. Glucose is fully oxidized in this process. The acetyl CoA combines with 4-carbon compound oxaloacetate to form 6C citrate. In this process, 2 molecules of CO2 are released and oxaloacetate is recycled. Energy is stored in ATP and other high energy compounds like NADH and FADH2. This process produces 2 ATP molocules.
- The third and final Phase of Aerobic respiration is the Electron transport is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. It occurs in mitochondria in both cellular respiration and photosynthesis. Electron transport Chain produces 28 ATP meaning that the whole of aerobic cellular respiration produces a total of 32 ATP molecules.
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