This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Histo Pathology, Subject name: Pathology
[{'content': 'Acridine orange is a fluorescent dye used to bind? \nSelect and explain. \nA. DNA and RNA, B. Protein, C. Lipid, D. Carbohydrates', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) DNA and RNARef: Harrison /150e-2* Acridine orange is a nucleic acid selective-fluorescent cationic dye useful for cell cycle determination.* It is cell-permeable, and interacts with DNA and RNA by intercalation or electrostatic attractions respectively and emits green and red right respectively.* Acridine orange can be used in conjunction with ethidium bromide to differentiate between live and apoptotic cells.', 'role': 'assistant'}]