Purines are which type of structures?

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Multiple Choice

Purines are which type of structures?

Explanation:
Purines are two-ring structures. They consist of a six-member ring fused to a five-member ring, giving a bicyclic system. Adenine and guanine are purines. In contrast, pyrimidines have a single ring (cytosine, thymine, and uracil). This difference in the number of rings helps maintain the uniform width of the DNA double helix, since purines pair with pyrimidines to form base pairs.

Purines are two-ring structures. They consist of a six-member ring fused to a five-member ring, giving a bicyclic system. Adenine and guanine are purines. In contrast, pyrimidines have a single ring (cytosine, thymine, and uracil). This difference in the number of rings helps maintain the uniform width of the DNA double helix, since purines pair with pyrimidines to form base pairs.

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