Which of the following is NOT one of the differences between $\mathrm{RNA}$ and $\mathrm{DNA}$?

• A. $\mathrm{RNA}$ and $\mathrm{DNA}$ both have the same type of phosphate backbone.
• B. $\mathrm{RNA}$ uses uracil instead of thymine found in $\mathrm{DNA}$.
• C. $\mathrm{RNA}$ contains ribose sugar, while $\mathrm{DNA}$ contains deoxyribose sugar.
• D. $\mathrm{RNA}$ is typically single-stranded, whereas $\mathrm{DNA}$ is double-stranded.

Answer: (A)

Verified step by step guidance

1. Identify the structural components of RNA and DNA: RNA contains ribose sugar, uracil, and is typically single-stranded, while DNA contains deoxyribose sugar, thymine, and is double-stranded.
2. Understand the role of the phosphate backbone: Both RNA and DNA have a phosphate backbone, which is a common structural feature.
3. Compare the nitrogenous bases: RNA uses uracil, whereas DNA uses thymine. This is a key difference between the two nucleic acids.
4. Examine the sugar component: RNA contains ribose sugar, while DNA contains deoxyribose sugar. This is another fundamental difference.
5. Analyze the strand structure: RNA is typically single-stranded, whereas DNA is double-stranded. This is a significant structural difference.