Answer:
NAD+
Explanation:
Both glycolysis and the citric acid cycle require NAD+ to accept electrons during their chemical reactions. In order for the cell to continue to generate any ATP, NADH must be converted back to NAD+ for use as an electron carrier.
Source: https://openoregon.pressbooks.pub/mhccmajorsbio/chapter/7-8-fermentation-an-anaerobic-process/
