Purines can form hydrogen bonds with which type of base?

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Multiple Choice

Purines can form hydrogen bonds with which type of base?

Explanation:
Bases pair through hydrogen bonds in a way that keeps the DNA and RNA structures consistent in width. Purines, which are the two-ring bases (adenine and guanine), pair with pyrimidines, the single-ring bases (cytosine, thymine in DNA, and uracil in RNA). This pairing pattern—adenine with thymine or uracil, and guanine with cytosine—lets the two strands fit together smoothly. Hydrogen bonds form specifically between these bases, not with the sugar backbone or with amino acids. So purines form hydrogen bonds with pyrimidines.

Bases pair through hydrogen bonds in a way that keeps the DNA and RNA structures consistent in width. Purines, which are the two-ring bases (adenine and guanine), pair with pyrimidines, the single-ring bases (cytosine, thymine in DNA, and uracil in RNA). This pairing pattern—adenine with thymine or uracil, and guanine with cytosine—lets the two strands fit together smoothly. Hydrogen bonds form specifically between these bases, not with the sugar backbone or with amino acids. So purines form hydrogen bonds with pyrimidines.

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