Question

the answer nadh and fadh2 will drop their supply of answer off at the etc. the answer from the hydrogen will be removed and passed down the answer. nad+ and fadh will then return to answer to do it all again.
acetyl coa hydrogen glycolysis, pyruvate mod. and the cac polymer protons helium electrons etc electron shuttles

Explanation:

NADH and FADH2 are electron - shuttles that carry electrons to the electron transport chain (ETC). In the ETC, electrons are passed down a series of protein complexes. Hydrogen atoms are split into protons and electrons. The electrons are passed along the ETC, and the protons are pumped into the intermembrane space creating a proton gradient. NAD+ and FAD return to glycolysis, pyruvate metabolism, and the citric acid cycle (CAC) to be reused.

Answer:

The electron shuttles NADH and FADH2 will drop their supply of electrons off at the ETC. The electrons from the hydrogen will be removed and passed down the ETC. NAD+ and FAD will then return to glycolysis, pyruvate mod. and the CAC to do it all again.