Which bases belong to the purine category?

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Multiple Choice

Which bases belong to the purine category?

Explanation:
Purines are nitrogenous bases with a two-ring structure. The purines are adenine and guanine. In nucleic acids, these two form the larger bases, while cytosine, thymine, and uracil are pyrimidines with a single ring. The only pair listed that contains both purines is adenine and guanine. The other pairs mix in pyrimidines (C, T, or U) or are not both purines, so they don’t belong to the purine category.

Purines are nitrogenous bases with a two-ring structure. The purines are adenine and guanine. In nucleic acids, these two form the larger bases, while cytosine, thymine, and uracil are pyrimidines with a single ring. The only pair listed that contains both purines is adenine and guanine. The other pairs mix in pyrimidines (C, T, or U) or are not both purines, so they don’t belong to the purine category.

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