B is your answer hope it helps
If your choices are the following:
Allosteric site
Active site
Regulatory region
<span>Coding region
</span>The the <span>part of the gene which is broken in this allele is the c</span>oding region.This is a part in which its role is the portio<span>n of a gene's DNA or RNA, composed of exons, that codes for protein.</span>
A nucleic Acid is a long repeating chain of nucleotides