Assertion: uracil | /r/IsA | pyrimidine
Facets:
Source sentences:
text: Cytosine, thymine, and uracil are classified as pyrimidines which have a single carbon-nitrogen ring as their primary structure.
text: Cytosine, thymine, and uracil are classified as pyrimidines which have a single carbon-nitrogen ring as their primary structure (Figure 1).