What is equivalent to half glucose molecule that has been oxidized to the extent of losing two electrons as hydrogen atoms:

Explanation

Pyruvic acid (pyruvate) is the end product of glycolysis and does not enter the Krebs cycle directly. The pyruvate (a 3-carbon molecule) is first changed into a 2-carbon acetic acid molecule. One carbon is released as CO2 coenzyme-A (CoA) to form acetyl CoA (Active acetate). In addition, more hydrogen atoms are transferred to NAD.