It seems like you're asking about the parts of a gene that aren't translated into protein. These regions are called non-coding regions or introns.

Here's a breakdown:

* Genes contain the instructions for building proteins.

* Exons are the coding regions of a gene that are translated into protein.

* Introns are the non-coding regions of a gene that are removed before translation.

Why are introns removed?

Introns are essentially "filler" DNA that doesn't code for protein. They are removed during a process called splicing. Splicing ensures that only the exons are joined together to form the final mRNA molecule that will be translated into protein.

Note: There are also other non-coding regions in the genome besides introns, such as promoters and regulatory sequences that control gene expression.

Let me know if you have more questions!