2.18 Lesson Glucose and ATP: Cellular Respiration

Energy is stored as glucose, and then it is released to make ATP through glycolysis, the Krebs Cycle, and Electron Transport Chain.

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​ATP

​One molecule of Glucose is broken down to 2 molecules of pyruvate. 2 net ATP is also Produced

​​Glycolisis

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Each molecule of pyruvate enters the cycle and produces CO₂, two more net ATP, and the electron carriers NADH and FADH₂

​​Krebs Cycle or Citric Acid Cycle

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NADH and FADH₂ donate high energy electrons to a series of proteins embedded in the inner membrane. Results in lots of ATP produced (30-40 molecules).

​​Electron Transport Chain

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So here is the overall reaction for Cellular Respiration

Glucose + Oxygen --> Carbon dioxide + Water + Energy

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C₆H₁₂O₆ + 6 O₂ --> 6 CO₂ + 6 H₂O + ATP​

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This is respiration requiring oxygen.

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Cellular Respiration is an example of aerobic respiration because oxygen has to serve as the final electron acceptor in the electron transport chain (ETC)

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​Aerobic Respiration