This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Biology Techniques, Subject name: Biochemistry
[{'content': 'Function of endonucleases: \nSelect and explain. \nA. Cut DNA at specific DNA sequences, B. To point out the coding regions, C. Enhancers, D. To find out antibiotic resistance', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Cut DNA at specific DNA sequences(Ref: Harper 31/e page433)Restriction endonuclease cut DNA at specific palindromic sites.These enzymes are isolated from bacteria.They restrict the entry of phages into the bacteria.', 'role': 'assistant'}]