This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Key glycolytic enzymes in glycolysis are all except: 
Select and explain. 
A. Phosphofructokinase, B. Hexokinase, C. Pyruvate kinase, D. Glucose-1, 6, diphosphatase
D: Glucose-1, 6, diphosphatase
Answer: D: Glucose-1, 6, diphosphatase 
Explanation: Glycolysis/Embden-Meyerhof pathway is the sequence of reactions that conves glucose into pyruvate with the concomitant production of a relatively small amount of adenosine triphosphate (ATP)It is the initial process of most carbohydrate catabolism, and it serves three principal functions:Generation of high-energy molecules (ATP and NADH) as cellular energy sources as pa of aerobic respiration and anaerobic respiration.Production of pyruvate for the citric acid cycle as pa of aerobic respirationProduction of a variety of six- and three-carbon intermediate compounds, which may be removed at various steps in the process for other cellular purposesIn eukaryotes and prokaryotes, glycolysis takes place within the cytosol of the cell.