Question

ATP yield in glycolysis is:

• A. 2
• B. 4
• C. 6
• D. 8

Answer 1

Answer:

A. 2

• Glycolysis consumes 2 ATP in the preparatory phase (steps 1, 3) but produces 4 ATP via substrate-level phosphorylation in the payoff phase (steps 7, 10—twice per glucose).