Here's how it works:
* Glycolysis is a metabolic pathway that breaks down glucose into pyruvate.
* During glycolysis, glyceraldehyde 3-phosphate (G3P) is oxidized.
* Two hydrogen atoms are removed from G3P and transferred to NAD+, reducing it to NADH.
This reaction is important because it allows for the capture of energy from the breakdown of glucose. NADH carries these electrons to the electron transport chain, where they are used to generate ATP (adenosine triphosphate), the cell's energy currency.