Final answer:
Electrons are stripped from G3P during glycolysis by the enzyme glyceraldehyde-3-phosphate dehydrogenase, which oxidizes G3P and reduces NAD+ to NADH, transferring the high-energy electrons to the electron transport chain.
Step-by-step explanation:
In the stage of glycolysis concerned with the conversion of glyceraldehyde 3-phosphate (G3P) to pyruvate, it is the enzyme glyceraldehyde-3-phosphate dehydrogenase that strips electrons from G3P. The process involves the oxidation of G3P, where a hydrogen atom is removed from it, and subsequently, it is phosphorylated to produce 1,3-bisphosphoglycerate. During this reaction, the high-energy electrons that are removed from the sugar are picked up by the electron carrier NAD+, which is reduced to NADH. This NADH carries the high-energy electrons to the electron transport chain, where they can be used for the production of ATP, the energy currency of the cell.