<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:To maintain blood glucose levels even after glycogen stores have been depleted, the body, mainly the liver, is able to synthesize glucose in a process called gluconeogenesis. Which of the following reactions of gluconeogenesis requires an enzyme different from glycolysis?? A: 2-phosphoglycerate -- 3-phosphoglycerate, B: Fructose 1,6-bisphosphate -- Fructose-6-phosphate, C: Phosphoenolpyruvate -- 2-phosphoglycerate, D: Dihydroxyacetone phosphate -- Glyceraldehyde 3-phosphate, E: 1,3-bisphosphoglycerate -- Glyceraldehyde 3-phosphate,  <response>: This is a question about gluconeogenesis, which is the metabolic pathway that produces glucose from non-carbohydrate carbon substrates like lactate, glycerol, and glucogenic amino acids. The key is to identify which reaction in gluconeogenesis uses a different enzyme than the reverse glycolytic reaction. Choice A involves the conversion of 2-phosphoglycerate to 3-phosphoglycerate, which is catalyzed by phosphoglycerate mutase in both glycolysis and gluconeogenesis. Choice B involves the conversion of fructose 1,6-bisphosphate to fructose 6-phosphate, which is catalyzed by fructose bisphosphatase in gluconeogenesis and phosphofructokinase-1 in glycolysis - so this is a different enzyme.Choice C involves the conversion of phosphoenolpyruvate to 2-phosphoglycerate, which is catalyzed by enolase in both pathways. Choice D involves the conversion of dihydroxyacetone phosphate to glyceraldehyde 3-phosphate, catalyzed by triose phosphate isomerase in both pathways. Choice E involves the conversion of 1,3-bisphosphoglycerate to glyceraldehyde 3-phosphate, catalyzed by glyceraldehyde 3-phosphate dehydrogenase in both pathways.So choice B is the correct answer, as it involves an enzyme fructose bisphosphatase that is unique to gluconeogenesis.B: Fructose 1,6-bisphosphate -- Fructose-6-phosphate 