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← ScienceWhich mechanism inhibits enzyme activity when a heavy metal binds to a protein's sulfhydryl groups?
A)Conformational change via disulfide bridge formation✓
B)Competitive binding at the active site
C)Allosteric activation of inhibitor molecules
D)Hydrolysis of the peptide backbone
💡 Explanation
When a heavy metal binds to sulfhydryl groups, disulfide bridges can form due to increased oxidation, which changes the protein's conformation and thus inhibits enzyme activity. Therefore, conformational change occurs, rather than competitive binding, allosteric activation, or hydrolysis, each dependent on its own specific mechanism.
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