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Homework answers / question archive / A pyrimidine has one ring; a purine has two rings
A pyrimidine has one ring; a purine has two rings.
The pyrimidines (##bb"C"##ytosine, ##bb"U"##racil, and ##bb"T"##hymine) all have one ring.
The purines have two rings.
One way to remember the difference is:
The pyrimidines are C U T from the purines.
If they were no labels in the picture below, could you identify the purines and the pyrimidines?
