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Glycolysis and the Krebs Cycle

Glycolysis and the Krebs Cycle


We did not explicitly develop glycolysis and energy metabolism pages, but there is a wealth of good information on these topics that other people have developed, and this directory allows to to get to those sources. Note that there won't be links from these other sites back to the MIT Biology Hypertextbook. Therefore, use the "Back" key to return to the MIT Biology Hypertextbook.


  1. A nice, quick summary of glycolytic metabolism (obtaining energy from glucose), done at the University of Virginia.
  2. A clear chart of the intermediates of glycolysis, also done at the University of Virginia.
  3. A beautiful diagram of the electron transport chain. Note that this diagram is somewhat unclear. As the electron is passed on from protein to protein in the membrane, the energy of the electron is used to pump an H+ from the inside to the outside, creating a gradient of H+. The H+ then gets back into the inner mitochondrion by passing through ATP synthetase (shown). This is how the energy of the electron is used to make ATP.
  4. A summary of how much energy (counted in molecules of ATP) is obtained from metabolizing one molecule of glucose, also from the University of Virginia.
  5. There is also a more complicated but more informative set of sites put together by the Database of Enzymes and Metabolic Pathways on Glycolysis and Metabolism of TCA (the Krebs cycle) intermediates.
  6. Carbohydrates is a nice page at the Univ. of North Carolina that discusses the human biology of eating sugars and starches.
  7. Glycolysis/Respiration Problems

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