The two molecules of PGAL assist a series of energy harvesting reactions. Notice what is happening with the phosphate groups (represented by the
yellow balls marked with a "P").

As PGA goes through a reaction to change to PEP, and PEP goes through a reaction to change to pyruvate, these molecules lose phosphate groups. Of
the following, which correctly states where the phosphates go?
O To attach to ADP to form molecules of ATP
O To attach to pyruvate
O To attach to glucose

The number of NADH molecules created in glycolysis is ________
. (Note: Click on the box and type in the number.)