Question

How many molecules of oxygen are used during the glycolysis of one glucose molecule?

• A. 2
• B. 32
• C. 38
• D. Zero

Answer 1

The correct option is D Zero

• Glycolysis is the process of partial oxidation of glucose into two molecules of pyruvic acid through the enzyme-mediated reaction series.
• Here two molecules of ATP are utilized. First during the conversion of Glucose to Glucose-6-phosphate and second during the conversion of Fructose-6-phosphate to Fructose-1,6-biphosphate.
• 4 molecules of ATP are synthesized during 2 substrate based phosphorylated reaction.
• First 2 molecules of ATP released during the conversion of 2 molecules of 1,3 bisphosphoglyceric acid to 2 molecules of 3 phosphoglyceric acids. Next 2 molecules are released during the conversion of 2 molecules of phosphoenolpyruvate to 2 molecules of pyruvic acid.
• In splitting of one glucose molecule into two pyruvates only the enzymes present in the cytoplasm are used and no oxygen is required.
• It is an anaerobic process.

So, the correct option is D ' zero'.