Chemistry Purines and pyrimidines are__________________? Options:A. EnzymesB. Nitrogenous basesC. CarbohydratesD. LipidsView AnswerB. Nitrogenous bases Continue Reading Previous: 10ml of alcohol dissolve in 90ml of water unit of concentration used is________________?Next: Which of the following will not form crystalline structure with opporitely charged ions_________________?