Classification. Answer the following questions in reference to the five nucleotides listed below.
-This nucleotide is not incorporated into the structure of the DNA helix.
A)Guanine
B)Cytosine
C)Pyrimidine
D)Thymine
E)Uracil

Question

Quizplus · Accepted Answer

Uracil is not incorporated into the structure of DNA helix, but only in RNA. The other nucleotides listed (A, C, G, T) are all part of DNA. The term "pyrimidine" refers to a class of nucleotides that includes both cytosine and thymine, so it is not the best choice for this question.