Which of the following is (are)True of snRNPs?
A)They are made up of both DNA and RNA.
B)They bind to splice sites at each end of the exon.
C)They join together to form a large structure called the spliceosome.
D)They act only in the cytosol.
E)They attach introns to exons in the correct order.

Question

Quizplus · Accepted Answer

SnRNPs (small nuclear ribonucleoproteins) join together to form a large structure called the spliceosome, which is responsible for removing introns from pre-mRNA during splicing. Choices A, B, D, and E are incorrect because snRNPs are composed of RNA and protein, not DNA and RNA; they bind to specific sequences within introns, not splice sites at the ends of exons; they act in the nucleus (not the cytosol) where pre-mRNA is processed; and they do not attach introns to exons, but rather aid in the removal of introns to leave behind only the protein-coding exons in the mature mRNA.

Which of the Following Is (Are)True of SnRNPs