Which of the following is a key difference between DNA and RNA?

Question

A: DNA is typically found in the cytoplasm, while RNA is found in the nucleus.

B: DNA is single-stranded, while DNA is double-stranded

C: Dna contains thymine, while RNA contains uracil

D: DNA uses ribose sugar, while RNA uses deoxyribose sugar

Answer 1

The key difference between DNA and RNA among the options provided is:

C: DNA contains thymine, while RNA contains uracil.

This statement accurately describes one of the fundamental differences between the two nucleic acids.

To clarify the inaccuracies in the other options:

A: DNA is typically found in the nucleus, while RNA is found in the cytoplasm. (This is the correct structure, but it’s the opposite of what you stated.)

B: DNA is double-stranded, while RNA is typically single-stranded. (This statement is misleading as DNA should be described as double-stranded, and RNA single-stranded instead of using "while DNA".)

D: DNA uses deoxyribose sugar, while RNA uses ribose sugar. (This is also a reversal; DNA has deoxyribose, and RNA has ribose.)

Thus, option C is the correct choice.