During nuclear processing of an pre-mRNA in a eukaryote, the portions discarded are
A) exons.
B) introns.
C) duplicate genes.
D) methylated regions.
E) poly A chains.

Question

Quizplus · Accepted Answer

During nuclear processing of pre-mRNA in eukaryotes, the introns (non-coding sequences) are spliced out and discarded, while the exons (coding sequences) are put together to form the mature mRNA transcript. Duplicate genes, methylated regions, and poly A chains are not specifically involved in this process.

During Nuclear Processing of an Pre-MRNA in a Eukaryote, the Portions