Can anyone explain the whole process of aerobic respiration? just a short explanation would do. 5-8 sentences

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trophyhunter1's profile pic

trophyhunter1 | College Teacher | (Level 1) Educator Emeritus

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The process of aerobic respiration is the series of catabolic chemical reactions that occurs in cells that use oxygen, to produce the high energy compound ATP. This compound provides the energy for cell's to carry out life process. Glucose is broken down in a series of chemical steps, into smaller molecules, releasing the energy that was stored in its chemical bonds. Glucose is combined with oxygen to produce 36 ATP, plus the wastes carbon dioxide and water. First glycolysis occurs in the cytosol of the cells. It is anaerobic, and one glucose is converted into two molecules of pyruvate and 2 ATP molecules are generated. Aerobic respiration occurs in two steps--the Krebs cycle and Electron Transport Chain. Before the Krebs cycle, pyruvate enters the mitochondrion and  is converted to acetyl-CoA and CO2 with the help of an enzyme called coenzyme A. During this step, one molecule of NADH and one CO2 is produced and this is the transition step. Next, comes the Krebs or Citric Acid cycle. In this step, mitochondria in the cell will undergo aerobic respiration. Acetyl CoA enters and gets oxidized to CO2, and NAD is reduced to NADH. Also produced are FADH, and ATP. These are used by the electron transport chain occurring in the cristae or inner membrane of the mitochondrion, to make more ATP during oxidative phosphorylation. Two acetyl-CoA are metabolized by the Krebs cycle to produce at net yield of approximately 34 ATP. Enzymes and coenzymes are needed for one molecule of glucose to be fully oxidized into carbon dioxde. A total of 36 ATP are produced from one molecule of glucose undergoing aerobic respiraiton.

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nancy167's profile pic

nancy167 | College Teacher | (Level 1) Salutatorian

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Aerobic respiration: Aerobic respiration is process of cellular respiration that uses oxygen. It is a biological process that takes energy from glucose other organic molecules like ATP Adenosine tri phosphate.

Here are the four steps of Aerobic Respiration:

1. Glycolysis: It is the starting point of aerobic respiration. The process of glycolysis occurs in the cytoplasm of the cell. During glycolysis, a six-carbon molecule is converted into two three-carbon molecules of pyruvate. In this process two molecules of ATP is consumed.
2. Formation of Acetyl Co enzyme A: In this step there is the formation of Acetyl Co enzyme A.. Pyruvate is brought into the mitochondria to be oxidized, creating a 2-carbonacetyl group.
3. Citric acid cycle: This is the third step of aerobic respiration. In this step oxaloacetate combines with the acetyl coenzyme A, creating citric acid. Glycolysis and Citric acid cycle create one molecules of ATP as well as six NADH and two FADH. 
4. Electron transport chain: This is the final step of Aerobic respiration. In this step NADH and FADH donate their electrons to produce large amount of ATP. In aerobic respiration one molecules of glucose creates a total of 34 ATP molecules.

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