The primary structure of DNA consists of a string of nucleotides. Each nucleotide consists of a five-carbon sugar, a phosphate, and a base. There are two types of DNA bases: purines (adenine and guanine) and pyrimidines (thymine and cytosine) .
-How do the sugars of RNA and DNA differ?
A) RNA has a six-carbon sugar; DNA has a five-carbon sugar.
B) The sugar of RNA has a hydroxyl group that is not found in the sugar of DNA.
C) RNA contains uracil; DNA contains thymine.
D) DNA's sugar has a phosphorus atom; RNA's sugar does not.
Correct Answer:
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