What would happen if snRNPs did not recognize the branch point within an intron?
A)A lariat would not form.
B)snRNPs would not base-pair with the 5' end of the intron.
C)A 3' poly A tail would not be added to the transcript.
D)A 5' cap would not be added to the transcript.

Question

Quizplus · Accepted Answer

The branch point is an essential feature of intron splicing, as it is where the mRNA molecule is cleaved to form a lariat structure. If the snRNPs did not recognize the branch point, the lariat structure would not form and the intron would not be spliced out of the mRNA. Therefore, choice A is the correct answer.

What Would Happen If SnRNPs Did Not Recognize the Branch