Purines and pyrimidines refer to the _____ of the DNA molecules.
A)nitrogenous bases
B)sugar-phosphate backbone
C)hydrogen bonds
D)nucleus
E)histones

Question

Quizplus · Accepted Answer

Purines (adenine and guanine) and pyrimidines (cytosine and thymine) are nitrogenous bases that make up the building blocks of DNA molecules. The sugar-phosphate backbone, hydrogen bonds, nucleus, and histones are other components of DNA, but they are not what purines and pyrimidines specifically refer to.

Purines and Pyrimidines Refer to the _____ of the DNA