Which of the following intron groups is matched appropriately with a true statement?
A)Spliceosomal introns are removed using the catalytic ability of the intron itself.
B)Group I introns are removed from rRNAs that are found in mitochondria and chloroplasts.
C)Group I introns are removed from rRNAs using large protein- based enzyme complexes.
D)Spliceosomal introns are removed using large protein- based enzyme complexes.
E)Group II introns are removed from mRNA in mammals.

Question

Quizplus · Accepted Answer

Spliceosomal introns are removed from pre-mRNA in eukaryotes using large protein-based enzyme complexes called spliceosomes. Choice A is incorrect because spliceosomal introns are removed with the help of spliceosomes, not through the catalytic ability of the intron itself. Choice B is incorrect because Group I introns are typically found in within genes in bacteria and eukaryotic organelles, but not in rRNAs. Choice C is incorrect because Group I introns are typically removed through self-splicing, not with the help of large enzyme complexes. Choice E is incorrect because Group II introns are not found in mRNA of mammals, but rather in the genes of bacteria, archaea, and eukaryotic organelles.

Which of the Following Intron Groups Is Matched Appropriately with a True