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 of the following is required in the initial stage of the synthesis of haemoglobin? \nSelect and explain. \nA. Glycine, B. Histidine, C. Iron, D. Folic acid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Heme is synthesized in the mitochondria. Staing substances required in the synthesis of heme are succinyl CoA and glycine. Pyridoxal phosphate is required for activation of glycine. Globin the protein pa of hemoglobin is synthesized in ribosomes.', 'role': 'assistant'}]