Q19 · CSIR-NET Chemistry, June 2014
Paper: CSIR-NET June 2014 · Subject: Inorganic Chemistry · Chapter: Bioinorganic Chemistry · Topic: Zinc Enzymes · Marks: 2 · Difficulty: Easy
Molybdoenzymes can both oxidize as well as reduce the substrates, because
(a)Mo(VI) is more stable than Mo(IV)
(b)Mo(IV) can transfer oxygen atom to the substrate and Mo(VI) can abstract oxygen atom from the substrate
(c)Conversion of Mo(VI) to Mo(IV) is not favoured
(d)Mo(VI) can transfer oxygen atom to the substrate and Mo(IV) can abstract oxygen atom from the substrate.
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Oxo-transfer: Mo(VI)=O delivers an O atom to a substrate (reduction of Mo to IV), and Mo(IV) takes an O atom from a substrate (oxidation back to VI).
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