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: Medicine
[{'content': 'True statement about Restriction endonuclease: \nSelect and explain. \nA. Palindromic sequences observed, B. Protects bacteria from infection by virus, C. Restrict replication of DNA, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A, B, C i.e. Palindromic sequences observed; Protects bacteria from infection by virus; Restrict replication of DNA', 'role': 'assistant'}]