A.) In biological nitrogen fixation, (hydrogen, oxygen, N2, or ammonia) is (oxid

Question

A.) In biological nitrogen fixation, (hydrogen, oxygen, N2, or ammonia) is (oxidized or reduced) when it accepts (hydrogen, oxygen, or nitrogen) atoms, resulting in the production of (water, nitrogen gas, nitrate, or ammonia).

B.) Legumes produce (nitrogenase, nitrogen, leghemoglobin, oxygen, or bacteria) which regulates the amount of (nitrogen, leghemoglobin, oxygen, bacteria, or nitrogenase) present in the root nodule so (nitrogenase, nitrogen, leghemoglobin, oxygen, or bacteria) activity is not inhibited.

C.) The nitrogen sources used by humans are (inorganic or organic) compounds, while nitrogen gas is an (organic or inorganic) compound.

Explanation / Answer

Ans-A

N2 + 8 H+ + 8 e 2 NH3 + H2

n biological nitrogen fixation, N2 is reduced when it accepts hydrogen atoms, resulting in the production ammonia.

Note-Nitrogen fixation is one process by which molecular nitrogen is reduced to form ammonia. This complex process is carried out by nitrogen-fixing bacteria present in the soil

Ans-B

Legumes produce leghemoglobin which regulates the amount of oxygen present in the root nodule so nitrogenase activity is not inhibited.

Note-the presence of oxygen in the root nodules would reduce the activity of the oxygen-sensitive nitrogenase

Ans-C

The nitrogen sources used by humans organic compounds, while nitrogen gas is an inorganic compound.

Note- organic nitrogen present in form of living organism such as plants animal or in the intermediate products of organic matter decomposition.

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