Which of the following is a key feature of RNA?
Correct answer: C. Ribose and uracil
- A. Deoxyribose and thymine
- B. Double stranded and thymine
- C. Ribose and uracil
- D. Ribose and thymine
Explanation
RNA carries ribose, which has a hydroxyl group at carbon 2, and uses uracil in place of thymine, and it is normally single stranded. Deoxyribose and thymine are the DNA features, so options mixing one sugar with the wrong base can be eliminated at once. The extra hydroxyl is also why RNA is chemically less stable than DNA.
This question appeared on the UHS MDCAT 2025 paper, which you can sit online with every answer explained.
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About Ribonucleic Acid (RNA)
Ribonucleic acid is generally a single-stranded nucleic acid containing ribose and uracil instead of thymine. Coverage includes mRNA, tRNA and rRNA, complementary base pairing, transcription and translation, and the differences between RNA and DNA in structure, location and biological function.
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