This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Which is an allosteric protein -a) Transferrinb) Ceruloplasminc) Phosphofructokinase d) Haemoglobin \nSelect and explain. \nA. ac, B. b, C. cd, D. d', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hemoglobin is an allosteric protein, i.e. binding of an allosteric modulator to hemoglobin alter binding of other substrate or molecule (i.e. O2).\nPhosphofructokinase I is an allosteric enzyme and is regulated allosterically in glycolysis. All enzymes (except for ribozymes) are proteins. So PFK-I is an allosteric protein.', 'role': 'assistant'}]