Which statement is correct about DNA and RNA?

Which statement is correct about DNA and RNA?

• A. Both are double-stranded.
• B. DNA uses deoxyribose; RNA uses ribose.
• C. DNA contains uracil; RNA contains thymine.
• D. Both are single-stranded.

Answer: (B)

DNA differs from RNA in the sugar component of their nucleotides, which drives their distinct structures. DNA uses deoxyribose, while RNA uses ribose. This single-sugar difference makes DNA more chemically stable and supports the typical double-helix, two-stranded form, whereas RNA is usually single-stranded and can fold into various shapes. So the statement that DNA uses deoxyribose and RNA uses ribose is the accurate one. The other options clash with these fundamental features: RNA is not typically double-stranded like DNA, DNA does not contain uracil (it uses thymine), and RNA does not contain thymine in place of uracil.

DNA differs from RNA in the sugar component of their nucleotides, which drives their distinct structures. DNA uses deoxyribose, while RNA uses ribose. This single-sugar difference makes DNA more chemically stable and supports the typical double-helix, two-stranded form, whereas RNA is usually single-stranded and can fold into various shapes.

So the statement that DNA uses deoxyribose and RNA uses ribose is the accurate one. The other options clash with these fundamental features: RNA is not typically double-stranded like DNA, DNA does not contain uracil (it uses thymine), and RNA does not contain thymine in place of uracil.