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Which outcome arises for nitrogenase when catalytic electron transfer decreases?

A)Substrate-binding sites become less occupied
B)Magnesium-ATP hydrolysis activity increases
C)Nitrogen reduction activity is limited
D)Iron protein conformational changes accelerate

💡 Explanation

Limited electron transfer decreases nitrogenase nitrogen reduction activity because the **nitrogenase mechanism** requires several electron transfer steps from the Fe protein to ultimately reduce N2; therefore, nitrogen reduction is limited, rather than magnesium-ATP activity increasing under electron scarcity.

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