Nitrogen fixation:

Question

Nitrogen fixation:

Quizplus · Accepted Answer

Nitrogen fixation is the process of converting atmospheric nitrogen gas (N2) into a form that can be used by living organisms, such as ammonia (NH3) or nitrogen-containing organic molecules (e.g. amino acids and nucleotides). Therefore, option D is the correct choice. Option A is incorrect because nitrogen is not the final electron acceptor in the electron-transport chain, but rather oxygen is. Option B is partially correct, as molecular nitrogen is incorporated into amino acids and nucleotides, but it does not mention the conversion to ammonia. Option C is incorrect, as nitrogen fixation does not release nitrogen gas to the atmosphere, but rather it provides usable forms of nitrogen for organisms. Option E is also incorrect, as nitrogen fixation is primarily performed by free-living or symbiotic bacteria, rather than plant cells.

Nitrogen Fixation