Multiple choice In Glycolysis only Step ....., step.....and step......are Irreversible. 1, 7 & 10 3, 7 & 10 1, 3 & 10 3, 7 & 10 Reveal answer Fill a bubble to check yourself C Correct answer Explanation In glycolysis, steps 1 (hexokinase), 3 (phosphofructokinase), and 10 (pyruvate kinase) are highly exergonic and thus irreversible under physiological conditions.