Which of the following minerals is essential for the proper functioning of the enzyme sulfite oxidase?

A Copper
B Manganese
C Molybdenum ✓
D Selenium

Explanation

Sulfite oxidase is an enzyme that requires Molybdenum as a cofactor to catalyze the oxidation of sulfite to sulfate.

Source

Scientific literature, enzymology databases
Minerals and Trace Elements Biochemistry Enzyme Cofactors Hard MEDICAL Confidence: high