Guanine is which kind of base?

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Multiple Choice

Guanine is which kind of base?

Explanation:
Guanine is a nitrogenous base that belongs to the purines. Purines are the bases with two fused rings, like a double-ring structure, which distinguishes them from pyrimidines that have a single ring. So guanine is not a sugar molecule or a phosphate group—those are parts of the nucleotide’s backbone—it's the two-ring base that attaches to the sugar. In DNA, guanine pairs with cytosine through three hydrogen bonds, a pairing that fits the two-ring/pyrimidine pairing pattern.

Guanine is a nitrogenous base that belongs to the purines. Purines are the bases with two fused rings, like a double-ring structure, which distinguishes them from pyrimidines that have a single ring. So guanine is not a sugar molecule or a phosphate group—those are parts of the nucleotide’s backbone—it's the two-ring base that attaches to the sugar. In DNA, guanine pairs with cytosine through three hydrogen bonds, a pairing that fits the two-ring/pyrimidine pairing pattern.

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