4. In biological nitrogen fixation, nitrogen gas (N2) becomes _______[oxidized o

Question

4. In biological nitrogen fixation, nitrogen gas (N2) becomes _______[oxidized or reduced] when it accepts _______[Hydrogen(H2)/nitrogen(N2)/oxygen(O2)] atoms, resulting in the production of _______[nitrate(NO3)/ammonia(NH3)/water(H2O)/nitrogen gas(N2)].

5. Legumes produce ________(oxygen/leghemoglobin/nitrogen/nitrogenase/bacteria), which regulates the amount of ______(oxygen/leghemoglobin/nitrogen/nitrogenase/bacteria) present in the root nodule so _________(oxygen/leghemoglobin/nitrogen/nitrogenase/bacteria) activity is not inhibited.

6. Humans and other animals acquire their nitrogen from which of the following? (Choose all correct answers.)

a. plant protein b. protein from legumes c. protein from animals that eat plants d. protein from animals that eat other animals

7. Humans obtain nitrogen from _________(inorganic or.organic) sources. Plants can obtain nitrogen from ammonia, which is an _________(inorganic or organic) source.

Explanation / Answer

4. In biological nitrogen fixation, nitrogen gas becomes REDUCED when it accepts HYDROGEN resulting in in the production AMMONIA. Nitrogen fixation is an anaerobic process and is carried out with the help of bacteria.

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