Which of the following statements best summarizes the structural differences between DNA and RNA?
A) RNA is a protein, whereas DNA is a nucleic acid.
B) DNA is a protein, whereas RNA is a nucleic acid.
C) DNA nucleotides contain a different sugar than RNA nucleotides.
D) RNA is a double helix, but DNA is single-stranded.
E) A and D are correct.
Answer: C) DNA nucleotides contain a different sugar than RNA nucleotides.