Multiple Choice
The first step in eukaryotic pre-mRNA splicing is
A) ligation of the two exon sequences.
B) cleavage of the intron sequence at the branch site.
C) ligation of the branch site adenosine to the 5' end of the intron.
D) cleavage of the intron sequence at the 3' end.
E) ligation of U1 snRNA to the branch site.
Correct Answer:

Verified
Correct Answer:
Verified
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