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': 'Transition mutation of GATCCT is \nSelect and explain. \nA. GGTCCT, B. GTTCCT, C. GABCCT, D. GrUGGT', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Point mutation is of 2 types:-\n\n\nTransition Purine base is replaced by another purine base or pyrimidine base is replaced by another pyrimidine base.\nTransversion Purine base is replaced by pyrimidine base or vice vessa.\n\nIn given question,\n\xa0\xa0\xa0GATCCT and GGTCCT\xa0 → only option A shows transition mutation', 'role': 'assistant'}]