sentence2_structure: Glycolysis<>is<>a series of reactions$$$reactions<>is<>common to fermentation and cellular respiration
sentence1: Glycolysis is common to both fermentation and respiration, so pyruvate is a key juncture in catabolism.
sentence2: Glycolysis is a series of reactions that is common to fermentation and cellular respiration.
question: What series of reactions is common to fermentation and cellular respiration?