15. the step in cellular respiration that creates the energy-carrying molecules atp, nadh, and fadh, that
will power the final step

The  oxidative phosphorylation step in cellular respiration  creates the energy-carrying molecules ATP, NADH, and FADH, that  will power the final step

Explanation:

In the cellular respiration, the last step is oxidative phosphorylation. In electron transport chain (ETC) and chemiosmosis, the water molecule is formed by the four electros and four hydrogen ions and one molecular oxygen. the gradient is created by the hydrogen pumping step. This NADH and FADH2 carried, by the hydrogen and passed via  the electron transport chain to form the ATP. For each and every glucose molecule there forms 32 ATPs. Energy is made in the mitochondria and called chemiosmosis theory.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.