Multiple choice

Ammonia synthesis by nitrogenase requires..........ATP

  1. 2

  2. 4

  3. 8

  4. 16
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The biological nitrogen fixation reaction catalyzed by the nitrogenase enzyme is energetically expensive. It requires the hydrolysis of at least 16 ATP molecules to reduce one molecule of nitrogen gas into two molecules of ammonia.

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