Glycolysis is the catabolic process of breaking down glucose molecules. Glucose is an essential energy source and occurs in mostly all cells of all organisms as this break down results in the production of ATP. There are two phases in glycolysis which include; energy investment and energy payoff. The purpose of the energy investment phase is to create molecules with a high phosphoryl group transfer potential, the energy payoff is used to generate a small amount of ATP from molecules with a high phosphoryl group transfer potential than ATP. Glycolysis consists of a total of 10 reactions. Reactions from 1-5 all occur once however, all the other reactions occur twice for each glucose molecule.
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