Introns in nuclear genes contain three consensus sequences critical to splicing: a 5' splice site, a 3' splice site, and a branch point. The splicing of pre-mRNA takes place within a large complex called the spliceosome, which consists of snRNAs and proteins.
-If a splice site were mutated so that splicing did not take place, what would be the effect on the mRNA?
A) It would be shorter than normal.
B) It would be longer than normal.
C) It would be the same length but would encode a different protein.

Question

Quizplus · Accepted Answer

If a splice site is mutated and splicing does not occur, introns are not removed, resulting in longer mRNA.

Introns in Nuclear Genes Contain Three Consensus Sequences Critical to Splicing