Final answer:
Feedback inhibition is a regulatory mechanism that controls amino acid biosynthesis. When the concentration of a specific amino acid increases, it acts as a noncompetitive inhibitor and reduces its own production. This helps maintain a balance in amino acid levels and prevents cells from becoming toxic.
Step-by-step explanation:
Feedback inhibition is a regulatory mechanism that controls amino acid biosynthesis. This process involves the use of a pathway product, such as an amino acid, to inhibit its own further production. When the concentration of a specific amino acid increases, it binds to the first enzyme in the biosynthetic pathway and acts as a noncompetitive inhibitor, reducing the production of that amino acid. This mechanism helps maintain a balance in amino acid levels and prevents cells from becoming toxic.