Classification. Answer the following questions in reference to the five nucleotides listed below.
-This nucleotide is a double-ring molecule.
A)Guanine
B)Cytosine
C)Pyrimidine
D)Thymine
E)Uracil

Question

Quizplus · Accepted Answer

The only nucleotides that are double-ring molecules are purines, which include guanine and adenine. Cytosine, thymine, and uracil are all pyrimidines, which are single-ring molecules. Therefore, the best choices for a double-ring molecule are guanine and thymine.