38 is the answer. hope this helps.
What is cell specialization?
Answer: cell specialization is an adaptation to do a particular job in a cell
The amino acid change at a site distant from the active site of the enzyme alter the enzyme's substrate specificity by changing the shape of the protein.
<h3>What is an amino acid ?</h3>
An amino acid serves an organic molecule which contains basic amino group (−NH2), as well as acidic carboxyl group and organic R group .
However, for amino acid to change at a site distant from the active site, then there must be alterations to the shape of the protein.
Learn more about amino acid at;
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C. a natural resource that humans use to generate energy