Fill in the Blank Questions 31.The internal compartment of the mitochondria is the _______. 32.During fermentation in yeast, acetaldehyde accepts a hydrogen atom from NADH and is converted to _______________. Short Answer Questions 33.During fermentation, _______ is recycled by transferring its electrons to a molecule other than oxygen. Fill in the Blank Questions 34.Common endproducts of fermentation include __________ and _____. Short Answer Questions 35.ATP is formed when ___________ passes back across the membrane through ATP synthase channels. Â Â