Nitrogenase
(I)can be found in most bacteria and a few invertebrate animals.
(II)contains unique redox centers that contain both Fe and Mo.
(III)changes in conformation as a result of ATP hydrolysis.
(IV)carries out a reaction that reduces nitrogen to NO.

Question

Quizplus · Accepted Answer

Nitrogenase contains unique redox centers that indeed contain both iron (Fe) and molybdenum (Mo), and it undergoes conformational changes as a result of ATP hydrolysis. This enzyme is specialized for the fixation of atmospheric nitrogen (N2) into ammonia (NH3), not nitric oxide (NO), and it is not found in most bacteria but rather in a specific group of bacteria and some archaea that have the capability for nitrogen fixation.

Nitrogenase (I)can Be Found in Most Bacteria and a Few Invertebrate