Why Can Gene Expression Be Altered More Easily at the Level

Multiple Choice

Why can gene expression be altered more easily at the level of post- transcriptional processing in eukaryotes than in prokaryotes? Because

A) eukaryotic exons may be spliced in alternative patterns.
B) prokaryotes use ribosomes of different structure and size.
C) eukaryotic mRNAs get 5' caps and 3' tails.
D) eukaryotic mRNAs are more stable.
E) prokaryotic genes are expressed as mRNA, which is more stable in the cell.