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': 'Enzymes of Calvin cycle are \nSelect and explain. \nA. G-6-PD, B. Sedoheptulose-7-biphosphatase, C. Glycerol Kinase, D. Phosphoribulose kinase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The Calvin cycle is regulated by light-dependent activation of at least 5 enzymes: Rubisco(Ribulose Bisphosphate Carboxylase) NADP:glyceraldehyde-3-phosphate dehydrogenase Fructose-1,6-bisphosphate phosphatase Sedoheptulose-1,7-bisphosphate phosphatase Ribulose-5-phosphate kinase Of these 5 enzymes, all except rubisco are regulated by the ferredoxin-thioredoxin system. REF:DM VASUDEVAN TEXTBOOK OF BIOCHEMISTRY, EIGHTH EDITION,PG.NO.,304.', 'role': 'assistant'}]