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Adenine and guanine are? |
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Answer» Adenine and GUANINE are purine bases. These are structures COMPOSED of a 5-sided and 6-sided ring. Cytosine and THYMINE are pyrimidines which are structures composed of a SINGLE six-sided ring. Adenine always BINDS to thymine, while cytosine and guanine always bind to one another. |
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