During MRNA Processing, Splicing Reactions Are Initiated in the Branch

question 19

Multiple Choice

During mRNA processing, splicing reactions are initiated in the branch site by which reactive group?

• A) the 5'-OH of an uridylate residue
• B) the 2'-OH of an adenylate residue
• C) the OH of an adenylate residue
• D) the OH of a guanosine co-factor
• E) the 5'-phosphate of thymidine triphosphate (TTP)

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