Nitrogen-fixation by bacteria does not occur in the presence of:

Carbon dioxide

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Hydrogen

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Oxygen

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Sulphur

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Solution

The correct option is C
Oxygen

Nitrogenase is an enzyme involved in the fixation of free nitrogen of atmosphere. The fixation of nitrogen gas take place in the anaerobic environment as nitrogenase is inactivated by O₂.

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Question 6
The process of nitrogen-fixation by bacteria does not take place in the presence of:

(a) molecular form of hydrogen
(b) elemental form of oxygen
(c) water
(d) elemental form of nitrogen

Nitrogen fixation takes place in presence of oxygen.

Q. Nitrogen fixation is inhibited by oxygen. However, in aerobic nitrogen-fixing bacteria, nitrogen is fixed in the presence of oxygen. Nitrogenase in such organisms is protected by which one of the following mechanisms.

Q. Name any one symbiotic nitrogen fixing bacteria. How does it help in nitrogen fixation ?

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Nitrogen-fixation by bacteria does not occur in the presence of:

The correct option is C OxygenNitrogenase is an enzyme involved in the fixation of free nitrogen of atmosphere. The fixation of nitrogen gas take place in the anaerobic environment as nitrogenase is inactivated by O2.

The correct option is C
Oxygen

Nitrogenase is an enzyme involved in the fixation of free nitrogen of atmosphere. The fixation of nitrogen gas take place in the anaerobic environment as nitrogenase is inactivated by O₂.