Which base type has a single ring in nucleic acids?

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Multiple Choice

Which base type has a single ring in nucleic acids?

Explanation:
Single-ring bases are pyrimidines. In nucleic acids, bases fall into two families: purines, which have a fused two-ring structure, and pyrimidines, which are a single ring. Adenine and guanine are purines with two rings, while cytosine, thymine, and uracil are pyrimidines with one ring. So the base type with a single ring is pyrimidine.

Single-ring bases are pyrimidines. In nucleic acids, bases fall into two families: purines, which have a fused two-ring structure, and pyrimidines, which are a single ring. Adenine and guanine are purines with two rings, while cytosine, thymine, and uracil are pyrimidines with one ring. So the base type with a single ring is pyrimidine.

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