Which one of the following is not a way in which RNA differs from DNA?
A. RNA has uracil as one of its bases; DNA has thymine.
B. RNAs are typically single-stranded; DNA is double-stranded.
C. RNA nucleotides can possess only a single phosphate group; DNA nucleotides have one, two, or three phosphate groups.
D. RNA molecules are usually much shorter than DNA molecules.
E. The sugar component of RNA nucleotides is ribose; the sugar component of DNA nucleotides is deoxyribose.
Answer: C
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