General Knowledge - Biology - Discussion

Discussion :: Biology - Section 1 (Q.No.77)

77. 

Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

[A]. By cyanobacteria
[B]. By electrical discharges in the atmosphere
[C]. By industrially synthesised fertilizer
[D]. By denitrification

Answer: Option D

Explanation:

No answer description available for this question.

Tin said: (Feb 16, 2012)  
Denitrification is a microbially facilitated process of nitrate reduction that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products. Denitrifying bacteria form a necessary part of the process known as denitrification as part of the nitrogen cycle, their primary purpose being to metabolise nitrogenous compounds, with the assistance of the nitrase reductase enzyme, to turn oxides back to nitrogen gas or nitrous oxides for energy generation. Denitrification is a part of N2 cycle.

Richa said: (Nov 3, 2012)  
Denitrification is a process in which nitrates or nitrites are reduced back to nitrogen gas, with the help of nitrous reductase enzymes. This process takes place in complete absence of oxygen.

Shasha said: (Oct 5, 2014)  
Which is false?

Saba said: (Mar 24, 2015)  
I didn't understand this explanation please illustrate the main point.

Felicia said: (Jul 12, 2015)  
The answer is denitrification it is the process by which nitrate is reduced back to nitrogen gas.

Arun said: (Mar 4, 2016)  
Main point here is nitrogen is fixed means atmospheric nitrogen need to be changed(fixed) to be used by plants.

But denitrification is just opposite of nitrogen fixation. That is why option D is false.

Virender Paul said: (Aug 6, 2018)  
Denitrification is a microbially facilitated process where nitrate is reduced and ultimately produces molecular nitrogen through a series of intermediate gaseous nitrogen oxide products.

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