How Does DNA Differ from RNA

Question

How does DNA differ from RNA?
A) RNA uses only purines.
B) RNA uses a different five-carbon sugar.
C) RNA has a contains different sized phosphate groups.
D) RNA has multiple bases attached to the sugar.

Accepted Answer

DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. This difference in sugar leads to other differences in the nucleotides and structure of the molecule. For example, RNA uses uracil instead of thymine as one of its bases, and RNA is typically single-stranded, while DNA is double-stranded.

Answer: D 
 RNA has multiple bases, including adenine, guanine, cytosine, and uracil, attached to its sugar backbone, whereas DNA has only four bases, adenine, guanine, cytosine, and thymine, attached to its sugar backbone.