BIO NMDCAT Inhibitors

nmdcat.online July 13, 2026

During an experiment, enzyme activity decreases immediately after adding mercury ions. The most appropriate explanation is

A. Mercury binds strongly with sulfhydryl groups of the enzyme

✓

B. Mercury acts as a competitive substrate

C. Mercury increases the enzyme concentration

D. Mercury converts the substrate into an inhibitor

📝 Explanation

Mercury forms stable bonds with sulfhydryl (-SH) groups in enzymes, causing irreversible inhibition and loss of enzyme activity. Concept tested: Heavy metal inhibition.

📖 Additional Information

Mercury binds strongly with sulfhydryl groups of the enzyme
Mercury acts as a competitive substrate
Mercury increases the enzyme concentration
Mercury converts the substrate into an inhibitor

Mercury forms stable bonds with sulfhydryl (-SH) groups in enzymes, causing irreversible inhibition and loss of enzyme activity. Concept tested: Heavy metal inhibition.

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