MCAT Question of the Day
    •

    Q:

    Paraxanthine is a metabolite of caffeine in animals. Its structure is most similar to:
    		 

    A

    		 pyrimidine base

    B

    		 purine base

    C

    		 proline

    D

    		 arginine



    Nucleic Acid Structure and Function | Protein Structure and Function |
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