Question

Net gain of glycolysis is

• A. 3 ATP and 1 NADH2
• B. 2 ATP and 2 NADH2
• C. 6 ATP and 4 NADH2
• D. 10 ATP and 6 NADH2

Answer 1

The correct option is B 2 ATP and 2 NADH2

Glycolysisis an oxygen independent metabolic process that converts glucose into pyruvate.
The steps invovled in glycolysis reaction is separated into two phases - The preparatory phase and the pay-off phase.
The first five steps of the glycolysis reaction is known as the preparatory phase. A total of 2 ATP molecules are consumed during the preparatory phase.
The remianing steps of glycolysis are known as the pay-off phase. This phase is characterized by gain of the energy-rich molecules ATP and NADH.
A total of 4 ATP and 2 NADH2 are obtained at the end of this phase of glycolysis.
Therefore at the end of glycolysis, a net sum of 2 ATP and 2 NADH2 molecules are obtained.