Question: During mRNA splicing the second transesterification reaction occurs between _ _ _ _ _ _ _ _ _ _ A . The 3 ' splicing

During mRNA splicing the second transesterification reaction occurs between __________
A. The 3' splicing site of an intron and 5' splice site of an intron
B. The 3' splicing site of an intron and the branch point site in that intron
C. The 5' splicing site of an intron and 3' end of an exon
D. The 5' end of an exon and the 3' splice site

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