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KEY CONCEPT Cellular respiration is an aerobic process with two main stages.

Learn about the aerobic process of cellular respiration, its main stages including glycolysis, the Krebs cycle, and the electron transport chain. Understand the functions of pyruvate, NADH, FADH2, and oxygen, and the production of ATP in this process. Compare the Krebs cycle and the Calvin cycle.

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KEY CONCEPT Cellular respiration is an aerobic process with two main stages.

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  1. KEY CONCEPT Cellular respiration is an aerobic process with two main stages.

  2. Glycolysis is needed for cellular respiration. • The products of glycolysis enter cellular respiration when oxygen is available. • ATP molecules are used to split glucose • ATP molecules are produced • molecules of NADH produced • two molecules of pyruvate produced

  3. The Krebs cycle is the first main part of cellular respiration. • Pyruvate is broken down before the Krebs cycle. • carbon dioxide released • NADH produced

  4. The Krebs cycle produces energy-carrying molecules.

  5. The Krebs cycle produces energy-carrying molecules. • NADH and FADH2 are made

  6. Video • http://www.sumanasinc.com/webcontent/animations/content/cellularrespiration.html

  7. The electron transport chain is the second main part of cellular respiration. • The electron transport chain uses NADH and FADH2 to make ATP. • high-energy electrons enter electron transport chain • energy is used to transport hydrogen ions across the inner membrane • hydrogen ionsflow through achannel in themembrane

  8. The electron transport chain is the second main part of cellular respiration. • The breakdown of one glucose molecule produces up to38 molecules of ATP. • The electron transport chain uses NADH and FADH2 to make ATP. • ATP synthase produces ATP • oxygen picks up electrons and hydrogen ions • water is released as a waste product

  9. Do the Interactive reader Question andText Book Questions Reviewing > Main Ideas • What is the role of pyruvate in cellular respiration? • Describe in your own words the function of the Krebs cycle. • Explain the functions of electrons hydrogen ions, and oxygen in the electron transport chain. • Compare and Contrast, Describe the similarities and differences between the Krebs cycle and the Calvin cycle?

  10. Do the Interactive reader Question andText Book Questions Reviewing > Main Ideas • What is the role of pyruvate in cellular respiration? Pyruvate, produced by the breakdown of glucose, is needed for the Krebs cycle which is a part of cellular respiration. • Describe in your own words the function of the Krebs cycle. The Krebs cycle breaks down and extracts energy form carbon-based molecules transfers it to the Electrons transport chain, makes a small amount of ATP, and releases carbon dioxide. • Explain the functions of electrons hydrogen ions, and oxygen in the electron transport chain. The electron transport chain pumps hydrogen ions across the inner mitochondrial membrane. Hydrogen ions then flow through a channel that is bound to ATP syntheses. Oxygen picks up electrons and hydrogen ions so that the electron transport chain can continue to function.

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