Which statement correctly contrasts DNA and RNA?

Which statement correctly contrasts DNA and RNA?

• A. DNA contains ribose sugar and uracil.
• B. RNA contains deoxyribose sugar and thymine.
• C. RNA contains ribose sugar and uracil; DNA contains deoxyribose sugar and thymine.
• D. RNA and DNA share the same sugar and bases.

Answer: (C)

DNA and RNA differ in two clear ways: the sugar in their backbone and the bases they use. RNA uses ribose sugar and uracil as a base, while DNA uses deoxyribose sugar and thymine. The extra hydroxyl group on ribose makes RNA more reactive and less stable, which fits its typically shorter, versatile roles in the cell. DNA’s deoxyribose and thymine contribute to greater stability, helping preserve genetic information over time. So, the statement that RNA contains ribose sugar and uracil, whereas DNA contains deoxyribose sugar and thymine, is the accurate contrast.

DNA and RNA differ in two clear ways: the sugar in their backbone and the bases they use. RNA uses ribose sugar and uracil as a base, while DNA uses deoxyribose sugar and thymine. The extra hydroxyl group on ribose makes RNA more reactive and less stable, which fits its typically shorter, versatile roles in the cell. DNA’s deoxyribose and thymine contribute to greater stability, helping preserve genetic information over time. So, the statement that RNA contains ribose sugar and uracil, whereas DNA contains deoxyribose sugar and thymine, is the accurate contrast.