Question

Why do exons have to be
spliced together?

Answer 1

Answer:In genetic engineering, scientists splice together genetic material to produce new genes or to alter a genetic structure. In messenger RNA , the introns are removed, and exons are spliced together to yield the final messenger RNA that is translated. See also exon intron. The American Heritage® Science Dictionary Copyright © 2011.

Explanation:

Answer 2

Answer:

The exons are pasted together by the spliceosome to make the final, mature mRNA that is shipped out of the nucleus. ... During splicing, the introns are revmoved from the pre-mRNA, and the exons are stuck together to form a mature mRNA that does not contain the intron sequences.