Question

the segments of RNA that are retained after conversion of a pre-mRNA to a mature mRNA are called​

Answer 1

Explanation:

The pieces of the RNA that are not chopped out are called exons. ..

Answer 2

The pre-mRNA or hnRNA consists of both exons and introns.

Exons are the coding sequences or expressed sequences,

while introns are intervening sequences.

In the mature RNA, only the exons are present. Introns do not appear in mature RNA