Question

Which one of the following enzyme contains 'Mo' as prosthetic group?

• A. Phosphatase
• B. Dehydrogenase
• C. Isomerase
• D. Nitrate reductase

Answer 1

The correct option is D Nitrate reductase

The prosthetic group refers to the cofactor that is tightly or covalently bound to an enzyme molecule. Molybdenum is required as a prosthetic group by nitrate reductase (NR) enzyme. The molybdenum is an obligate requirement for the activity of NR enzyme. NR in higher plants is supposed to be a homo-dimer, with two identical subunits joined and held together by the molybdenum cofactor.

So, the correct answer is option D.