Question

If three molecules of glucose are metabolized to PEP, there would be how many net ATP directly generated?

Answer 1

Glucose net ATP production are 2 ATP molecules per glicolitic reaction. But, as this question asks for a previous step to glicolitic oxidization (that is pyruvate) it does not reach the full yield. Glucose to PEP (Phosphoenolpyruvate) yields 1 ATP, so the net production will be 3 ATP molecules per 6 glucose molecules oxidized to PEP.