Which of the Following is Characteristic of RNA but Not

Question

Which of the following is characteristic of RNA but not DNA?
A) Deoxyribose
B) Adenine and thymine
C) Double stranded
D) Uracil and adenine

Accepted Answer

RNA contains uracil as one of its four nitrogenous bases, whereas DNA contains thymine instead. Therefore, option D, "Uracil and adenine" is the only choice that differentiates RNA from DNA. Option A is incorrect because deoxyribose is found in DNA, not RNA. Option B is incorrect because adenine and thymine are present in DNA, while RNA comprises adenine and uracil. Option C is incorrect because double-stranded nucleic acid is a characteristic feature of DNA, but RNA is usually single-stranded.