How do purines and pyrimidines differ?
The purines in DNA are adenine and guanine, the same as in RNA. The pyrimidines in DNA are cytosine and thymine; in RNA, they are cytosine and uracil. Purines are larger than pyrimidines because they have a two-ring structure while pyrimidines only have a single ring.
What is the difference between purines and pyrimidines quizlet?
Pyrimidines have the ring built first, then the ribose (PRPP) added afterwards. Purines start with ribose and add the ring onto that.
