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.

Answer: (E)

Verified step by step guidance

1. Identify the structural differences between DNA and RNA. DNA is typically double-stranded, forming a double helix, while RNA is usually single-stranded.
2. Examine the nitrogenous bases present in each molecule. Both DNA and RNA contain adenine, guanine, and cytosine. However, DNA contains thymine, whereas RNA contains uracil.
3. Consider the sugar component in the backbone of each molecule. DNA contains deoxyribose sugar, while RNA contains ribose sugar.
4. Evaluate the given options to determine which statements correctly describe the differences between DNA and RNA.
5. Conclude that the first three listed responses accurately describe the differences between DNA and RNA, as they address structure, nitrogenous bases, and sugar components.