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': 'House keeping genes are \nSelect and explain. \nA. Inducible, B. Required only when inducer is present, C. Mutant, D. Not regulated', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e., Not regulated', 'role': 'assistant'}]