Purines include which bases?

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Multiple Choice

Purines include which bases?

Explanation:
Purines are the nitrogenous bases with two fused rings. The bases that fit this category are adenine and guanine. The other bases—cytosine, thymine, and uracil—are pyrimidines and have a single ring. So the bases that are purines are adenine and guanine. In DNA, A pairs with T and G pairs with C; in RNA, thymine is replaced by uracil, but adenine and guanine remain purines.

Purines are the nitrogenous bases with two fused rings. The bases that fit this category are adenine and guanine. The other bases—cytosine, thymine, and uracil—are pyrimidines and have a single ring. So the bases that are purines are adenine and guanine. In DNA, A pairs with T and G pairs with C; in RNA, thymine is replaced by uracil, but adenine and guanine remain purines.

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