Which of the Following Is Correct Regarding Splicing

Multiple Choice

Which of the following is correct regarding splicing?

A) CPSFs are products of RNA sequences designed to recognize the 3'OH at the splice site.
B) PABIII recognizes the A rich sequences at the 5' end of the splice site.
C) Lariats are the sequence recognized by the cleavage site.
D) smURFs are used to recognize the poly A tail and initiate slicing
E) snRNPs are the protein product of U rich RNAs that partially complement the 5' splice junction.