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': 'Pulsed gel electrophoresis is used for? \nSelect and explain. \nA. DNA, B. RNA, C. Ribosome, D. Protein', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., DNA Large DNA of size larger than 15 to 20 KB can be separated with higher resolution by periodically changing the voltage direction. This is called as pulsed gel Electrophoresis", 'role': 'assistant'}]