This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'Pyridoxal phosphate is required for \nSelect and explain. \nA. Gluconeogenesis, B. Glycogenolysis, C. Glycolysis, D. Fatty acid oxidation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Glycogen phosphorylase removes glucose as glucose-1-phosphate from glycogen (phosphorolysis). It contains pyridoxal. Formation of branches in glycogen phosphate (PLP) as a prosthetic group. The alpha-1,4 linkages in the glycogen are cleaved. removes glucose units one at a time. Enzyme sequentially hydrolyses alpha-1,4 glycosidic linkages, till it reaches a glucose residue, 3-4 glucose units away from a branch point. It cannot attack the 1,6 linkage at branch point.Ref: DM Vasudevan, 7th edition, page no: 124', 'role': 'assistant'}]