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Unit 2: The Cell Cellular Respiration: Harvesting Chemical Energy Review
  1. Living organisms require to perform cellular work. Energy flows into most ecosystems as and leaves as .
  2. Cellular is a catabolic pathway that consumes and organic molecules and yields the energy molecule by the transfer of .
  3. Electron transfer occurs through chemical reactions called reactions. Molecules such as NAD+ and FAD act as electron receptors in this pathway.
  4. In cellular respiration, is oxidized and is reduced, in a series of steps called the transport chain (ETC) to form .
  5. Cellular respiration comprises three metabolic stages: glycolysis, citric acid cycle, and oxidative phosphorylation.
    Review: Cellular Respiration
  6. In conditions, glycolysis is followed by , which does not produce , but regenerates NAD+, and allows glyocolysis to continue generating .
  7. Other organic molecules such as and can also enter cellular respiration via different pathways.
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