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5 votes
The nitrogenous bases cytosine and thymine are

a. purines.
b. a phosphate group.
c. a sugar group.
d. pyrimidines.

1 Answer

4 votes
Purines are adenine and guanine. So the answer should be D (Pyrimidines). besides, phosphate group and pentose sugar are a part of a nucleotide.
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