This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glycogen Metabolism and Glycogen Storage, Subject name: Biochemistry
[{'content': 'Key enzyme in glycogenolysis - \nSelect and explain. \nA. Branching enzyme, B. Glycogen synthase, C. Debranching enzyme, D. Glycogen phosphorylase', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e.. Glycogen phosphorylase Cycle / PathwayRate limiting enzymeGlycolysisGlycogen synthesis (glycogenesis)GlycogenolysisTCA cycleFatty acid synthesisCholesterol synthesisKetone body synthesisBile acid synthesisCatecholamine synthesisUrea synthesisPhosphofructokinase 1Glycogen synthaseGlycogen phosphorylaseIsocitrate dehydrogenaseAcetyl CoA carboxylaseHMG CoA reductaseHMG CoA synthetase7-a-hydroxylaseTyrosine hydroxylaseCarbamoyl transferase", 'role': 'assistant'}]