Of the three steps in the cellular respiration process, glycolysis is assumed to be the oldest, having evolved early in the evolution of cells. The Krebs cycle and ETC are thought to have evolved later. Why do scientists believe that glycolysis is the oldest form of ATP synthesis?

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    It is found in all kinds of living things.
    Glycolysis does not require any oxygen.
    The Krebs cycle and ETC occur in the mitochondria..
    All of the above are reasons why scientists think that glycolysis is ancient.
asked May 30, 2013 in Biology by anonymous
    

1 Answer

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All of the above are reasons why scientists think that glycolysis is ancient.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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