Which of the following is correct about mature RNA in eukaryotes?

Question. Which of the following is correct about mature RNA in eukaryotes?
A. Exons and introns do not appear in the mature RNA.
B. Exons appear, but introns do not appear in the mature RNA.
C. Introns appear, but exons do not appear in the mature RNA.
D. Both exons and introns appear in the mature RNA.

Answer: B. Exons appear, but introns do not appear in the mature RNA.

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