In which of the following types of eukaryotics RNAs are introns completely removed most of the time,although exceptions can occur?
(I)mRNA
(II)rRNA
(III)tRNA
A)I,II
B)I,III
C)II,III
D)I,II,III
E)none of the above

Question

Quizplus · Accepted Answer

In eukaryotic mRNA, introns are typically completely removed in the process of RNA splicing before the mature mRNA is exported from the nucleus to the cytoplasm for translation. In contrast, both rRNA and tRNA in eukaryotes have been shown to contain introns, although these introns are usually spliced out to generate the functional mature RNA molecules. Therefore, option A, which includes both mRNA and rRNA, is the correct answer.

In Which of the Following Types of Eukaryotics RNAs Are