Which of the following normally occurs regardless of whether or not oxygen (O2) is present? Naim 06:26 AP Biology Chapter 7 Which of the following normally occurs regardless of whether or not oxygen (O2) is present? A) fermentation B) glycolysis C) oxidation of pyruvate to acetyl CoA D) oxidative phosphorylation (chemiosmosis) E) citric acid cycle Answer: B Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+