Unit 2: The Living Cell Extras  Study Guide

Chapter 8 How Cells Harvest Energy from Food Review
  1. Metabolism involves the transformation of energy into energy in living things, and comprises and cellular .
     
     
     
  2. Cellular respiration is composed of two stages: occurs in the and the cycle occurs in .
     
     
     
  3. In glycolysis, is broken down into two three-carbon molecules, yielding a net of molecules of ATP per glucose. Review:
     
     
     
    • The pyruvates are passed into the where they are converted into acetyl-coA, which enters the cycle (citric acid cycle).
     
     
     
  4. In the Krebs cycle, each acetyl-coA yields molecule of ATP, and several molecules of and FADH2. Review:
     
     
     
    • The energy stored in and FADH2 is harvested by the transport chain (ETC) to make . Review:
     
     
     
  5. In conditions, glycolysis is followed by , which regenerates the electron receptor NAD+, and allows to continue generating ATP.
     
     
     
  6. Other macromolecules such as and can also enter cellular respiration via different pathways.
     
     
     
    Review exercise: 
     
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