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': 'Bacteria aquires restriction endonuclease by horizontal transfer. The result would be - \nSelect and explain. \nA. Bacteria can undergo mutation, B. Bacteria causes death of host DNA, C. Bacteria cannot survive because it lacks DNA methylase that protects the host DNA, D. It helps in DNA proof reading in bacteria', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Any bacteria is protected against its own RE by a companion enzyme, site-specific DNA methylase, which methylates the restriction sites recognised by that particular RE. If any bacteria acquire new RE by horizontal transfer, this RE will cleave bacterial DNA and kill bacteria.', 'role': 'assistant'}]