This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'Glucose is linked to hemoglobin through \nSelect and explain. \nA. N linkage, B. O linkage, C. C-C linkage, D. O-H linkage', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The glycated hemoglobins are together called HbA1 fraction.Out of this 80% molecules are HbA1c, where glucose is attached to the N -terminal valine of beta chain of hemoglobin. The rest of molecules are HbA1a1, where fructose 1,6-phospate and HbA1a2, where glucose-6-phosphate are attached. REF :DM VASUDEVAN TEXTBBOK ,7th EDITION; Page no :328', 'role': 'assistant'}]