Is guanine a purine or pyrimidine?
Score: 4.2/5 (60 votes) Because of their structural similarity, we usually refer the nine-member double rings adenine and guanine as purines, and six-member single-ring thymine, uracil, and cytosine are pyrimidines.Are guanine purines?The purine nucleotide bases are guanine (G) and adenine (A) which...