Question

The net gain of ATP molecules from the process of glycolysis is

• A. Zero.
• B. Two.
• C. Four.
• D. Eight.

Answer 1

The correct option is D Eight.

Process of glycolysis is carried out in cell cytoplasm. In this process one molecule of glucose is broken down into two molecules of pyruvic acid with the simultaneous production of 2 molecules of ATP by substrate level phosphorylation and 2 molecules of reduced coenzymes. If the reduced coenzymes are oxidised in mitochondria there will be a generation of 3 ATP molecules per molecule of reduced coenzyme. Hence, the process of glycolysis is believed to be the source of 8 molecules.