In molecular genetics, which nitrogenous base replaces thymine in ribonucleic acid (RNA) molecules?
Answer and explanation
Correct answer: D. Uracil
- Step 1: RNA contains the pyrimidine base uracil (U) instead of thymine (T), pairing with adenine during transcription. Answer: Uracil. Why not the others: Adenine, guanine, and cytosine are found in both DNA and RNA.
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