Pre-MRNPs That are Capped,spliced,and Cleaved Must Be _____ Before They

Question

pre-mRNPs that are capped,spliced,and cleaved must be _____ before they are called nuclear mRNPs.
A)elongated
B)phosphorylated
C)polyadenylated
D)transcribed

Accepted Answer

Nuclear mRNPs require a poly(A) tail to be considered fully processed and ready for export to the cytoplasm. While elongation, phosphorylation, and transcription may be necessary steps in gene expression, they do not specifically distinguish a pre-mRNP from a nuclear mRNP. Splicing and cleavage are also important processing steps, but do not alone make the pre-mRNP a fully processed nuclear mRNP.