One function of both alcohol fermentation and lactic acid fermentation is to Naim 06:21 AP Biology Chapter 7 One function of both alcohol fermentation and lactic acid fermentation is to A) oxidize NADH to NAD+. B) reduce NAD+ to NADH. C) reduce FADH2 to FAD+. D) reduce FAD+ to FADH2. E) do none of the above. Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+