Single ringed pyrimidines are:
Correct answer: A. Uracil, Cytosine and Thymine
- A. Uracil, Cytosine and Thymine
- B. Cytosine, Guanine and Uracil
- C. Adenine and Guanine
- D. Cytosine, Adenine and Thymine
Explanation
The pyrimidines, Thymine, Cytosine and Uracil, are smaller and have a single ring, while the purines, Adenine and Guanine, are larger and have two rings.
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