Glycolysis is the breakdown of glucose. It is the first step of cellular respiration. Pyruvic acids are formed during glycolysis. Two Pyruvic Acids. Glycolysis is the breakdown of glucose into two 3-carbon pyruvic acid molecules. For every pyruvic acid produced by glycolysis, 2 ATP molecules are formed. Glycolysis occurs in the cytoplasm. C6H12O6 + 2ATP +external image bio.para7.gif2pyruvate + 4ATP
Glycolysis does not require oxygen.