Outline of Campbell Biology Chapter 9

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IX. BIOSYNTHESIS

1. Some organic molecules of food provide the carbon skeletons or raw materials for the synthesis of new macromolecules.
   1. Some organic monomers from digestion can be used directly in anabolic pathways.
   2. Some precursors for biosynthesis do not come directly from digested food, but instead come from glycolysis or Krebs cycle intermediates which are diverted into anabolic pathways.
   3. These anabolic pathways consume ATP produced by catabolic pathways of glycolysis and respiration.
   4. Glycolysis and the Krebs cycle are metabolic interchanges that can convert one type of macromolecule to another in response to the cell's metabolic demands.

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