Is guanine a purine?

Answer Guanine is a purine, along with adenine, found in DNA and RNA. In DNA, guanine pairs with the pyrimidine cytosine on a complementary strand. Purines consist of two fused rings of carbon and nitroge... Read More »

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How many hydrogen bonds are there between cytosine&guanine?

Cytosine, a pyrimidine, and guanine, a purine, are two of the four nitrogenous bases which compose deoxyribonucleic acid, or DNA. There are three hydrogen bonds holding the two base pairs together.... Read More »