This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glycolysis, Subject name: Biochemistry
All of the following are regulating enzymes of glycolysis, except - 
Select and explain. 
A. Hexokinase, B. Glucokinase, C. Enolase, D. PhosphofructokinaseI
C: Enolase
Answer: C: Enolase 
Explanation: Ans. is 'c' i.e., Enolase o Glycolysis is regulated at 3 steps w hich are irreversible. These reactions are catalyzed by following key enzymes: (1) Hexokinase and glucokinase, (2) Phosphofructokinase -I, and (3) Pyruvate kinase.Metabolic pathwayRegulating enzymesGlycolysisHexokinseGlucokinasePhosphofructokinase-lPyruvate kinaseBridging between glycolysis & ICA cyclePyruvate dehydrogenaseTCA cycleCitrate synthase lsocitrate dehydrogenase a-keto glutrate dehydrogenaseGlycogenesisGlycogen synthaseGlycogenolysisGlycogen phosphorylaseGluconeogenesisPyruvate carboxylase PEP carboxykinase Glucose-6-phosphataseFructose-1, 6-bisphosphatase