1. NAD+ is reduced to NADH during both glycolysis and the Krebs cycle.
2. NAD+ can receive electrons for use in oxidative phosphorylation.
3. NAD+ is reduced by the action of dehy- drogenases.
4. NAD+ has more chemical energy than NADH.
5. In the absence of NAD+, glycolysis cannot function.

View the original article here