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.

Question

Quizplus · Accepted Answer

An exon is part of an intact, mature mRNA that leaves the nucleus. Exons make up the coding sequences of genes and are spliced together to form the final mRNA molecule that will be translated into a protein. They are distinguished from introns, which are intervening non-coding sequences that are removed during RNA processing.

An Exon Is