48.Glycolysis is only partially reversible because of energy barriers at the reactions catalyzed by: (A) hexokinase, triose phosphate isomerase and pyruvate kinase (B) hexokinase, pyruvate dehydrogenase and phosphoenolpyruvate carboxykinase (C) hexokinase, phosphofructokinase, and pyruvate kinase (D) hexokinase, glyceraldehyde 3-phosphate dehydrogenase and pyruvate kinase