<prompt> Which is not a common enzyme for glycolysis and gluconeogenesis?AldolaseGlucose-6-phosphatasePhosphoglycerate mutasePhosphoglycerate kinase  <response>: Seven of the reactions of glycolysis are reversible and are used in the synthesis of glucose by gluconeogenesis. Thus, seven enzymes are common to both glycolysis and gluconeogenesis : i Phosphohexose isomerase; ii Aldolase; iii Phosphotriose isomerase, iv Glyceraldehyde 3-phosphate dehydrogenase; v Phosphoglycerate kinase; vi Phosphoglycerate mutase; vii Enolase. Three reactions of glycolysis are irreversible which are circumvented in gluconeogenesis by four reactions. So, enzymes at these steps are different in glycolysis and gluconeogenesis. 