<prompt> Acridine orange is a fluorescent dye used to bind?DNA and RNAProteinLipidCarbohydrates  <response>: 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. 