Which of the following describes a difference between DNA and RNA?

• A. RNA molecules generally consist of a single polynucleotide chain, whereas DNA molecules generally consist of two polynucleotide chains organized into a double helix.
• B. Both molecules contain adenine, guanine, and cytosine, but DNA also contains thymine and RNA also contains uracil.
• C. They contain different sugars.
• D. The first and second listed responses correctly describe differences between DNA and RNA.
• E. The first three listed responses correctly describe differences between DNA and RNA.