Question

Segments of polypeptides that are retained following protein splicing are called

A) introns.
B) exons.
C) inteins.
D) exteins.
E) cleavage products.

Answer 1

The retained segments of polypeptides following protein splicing are called introns.

Step-by-step explanation:

Eukaryotic genes are composed of coding sequences called exons and intervening sequences called introns. During transcription, introns are retained in the pre-mRNA but are removed during processing to form mature mRNA that only contains exons. The process of removing introns and reconnecting exons is called splicing, and it is facilitated by a complex called a spliceosome.