During the splicing reaction,the intron-exon junctions are recognized by
A)snRNPs.
B)miRNAs.
C)SRP RNAs.
D)the lariat.
E)the branch point.

Question

Quizplus · Accepted Answer

The splicing reaction involves the recognition and removal of introns from pre-mRNA. Recognition of the intron-exon boundaries is facilitated by small nuclear ribonucleoproteins (snRNPs) which recognize and bind to specific sequences at the 5' and 3' ends of the intron. This allows the formation of the spliceosome, which catalyzes the splicing reaction. Therefore, the correct choice is A, as snRNPs are directly involved in recognizing the intron-exon junctions.

During the Splicing Reaction,the Intron-Exon Junctions Are Recognized by