Many heterocyclic amines occur naturally in what?

• Correct Answer: plants
• animals
• gases
• nuclei

Explanation: nucleic acids, which in turn compose the genetic material of cells and direct protein synthesis. (For more information about nucleic acids, see Chapter 19 "Nucleic Acids". ) Many heterocyclic amines occur naturally in plants. Like other amines, these compounds are basic. Such a compound is an alkaloid, a name that means “like alkalis. ” Many alkaloids are physiologically active, including the familiar drugs caffeine, nicotine, and cocaine.

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