Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as:

Explanation

Glycolysis is the initial stage of cellular respiration that occurs in the cytoplasm of the cell. It involves the breakdown of one molecule of glucose into two molecules of pyruvic acid. Glycolysis is an anaerobic process and does not involve the complete oxidation of glucose; it is followed by the TCA cycle and oxidative phosphorylation in aerobic conditions.