An Exon Is

Multiple Choice

An exon is:

A) a protein that is clipped out post-translationally.
B) RNA that is removed during the processing of an RNA molecule and remains inside the nucleus.
C) part of an intact, mature mRNA that leaves the nucleus.
D) a transfer RNA that binds to the codon.
E) a series of amino acids at the end of a new polypeptide that directs transcription to the ER.