Answer:
NADH releases two hydrogen and donate two electrons to coenzyme Q.
Step-by-step explanation:
Electron transport chain is the last part of aerobic respiration and the only components that uses molecular oxygen. It involve series of processes where electrons are transfer from electron donors to electron acceptors, this make Hydrogen ions accumulate within the matrix space. It occur in the mitondondrial matrix.
The NADH releases two hydrogen and donate two electrons to the coenzyme Q ( ubiquinone). The Q is lipid soluble and move through hydrophobic core of the membrane.
It received electrons from NADH and FADH2.