General Knowledge - Biology - Discussion

Discussion :: Biology - Section 1 (Q.No.10)


Plants absorb dissolved nitrates from soil and convert them into

[A]. free nitrogen
[B]. urea
[C]. ammonia
[D]. proteins

Answer: Option A


No answer description available for this question.

Deepak Soni said: (Oct 15, 2010)  
How it converts?

Anjunyol said: (Nov 27, 2010)  
I do not agree.

Nia John said: (Dec 17, 2010)  
In the soil ammonia gets oxidised to nitrates and bthen to nitrites. Plants takes up this nitrites which are reconverted to ammonia in the surface of leaves. And the excess nitrites present in the soil gets reduced to free nitrogen.

Shelley said: (May 17, 2011)  
Nodulated roots having nitrogen fixing bacteria to convert nitrates into free nitrogen.

Rohith said: (Aug 6, 2011)  
It is separated with the process called ammonification.

Lucky said: (Dec 12, 2011)  
But ultimately it convert in to protien.

Ashi said: (Dec 18, 2011)  
It is so converted by the nitrogen fixing bacteria i.e.rhizobium process nitrification.

Don said: (Mar 12, 2012)  
When a plant process photosynthesis, last products are O2, glucose, also it gives a free N2.

Because plant don't give us 100% O2 it also consist some part of N2, CO2.

Therefore last product is N2, answer A is correct.

Keerthana said: (Mar 12, 2013)  
To maintain level of nitrogen in atmosphere, plants do various processes. This process of maintaining level of nitrogen is called nitrogen cycle.

Atitsoe Lawrencia said: (May 25, 2013)  
I do not agree I think the nitrates is used by the plant for synthesis of protein after which a bacterium in the soil called Planococcus reduces it to to atmospheric nitrogen.

Swati said: (Jun 19, 2013)  
The plant absorb nitrate from the soil and convert it into plant proteins. Then how it convert it into free nitrogen.

Sai Vignesh said: (Nov 19, 2013)  
First of all plant will not absorb nitrates it is absorbed by the nitrifying bacteria.

Abhishek Patel said: (Jan 6, 2014)  
@Deepak Soni you have to check the nitrogen cycle of plants, in this cycle it is clearly explained how the plants converts nitrates into free nitrogen.

M K S said: (Jan 31, 2014)  
Plants obtain nitrogen through their roots in either the form of nitrate or ammonium. Atmospheric nitrogen N2 cannot be utilized by the Plant. So, consequence of N-cycle plants uptake nitrate which depleted or converted to free nitrogen and further, it utilized for protein synthesis.

Edosa Kinfu Deressa said: (Feb 22, 2014)  
Plant can convert nitrate in to free nitrogen.

Mr.Singh said: (Jun 5, 2014)  
Give the reaction of the conversion of nitrates into nitrites ?

Dhruvil said: (Jun 20, 2014)  
Plants absorbs various nitrates and converts them into amino acids.

Zain Tanoli said: (Jul 28, 2014)  
Plant first convert soil into nitrates and then into nitrogen.

Pramod M N said: (Aug 21, 2014)  
It converts nitrates into free nitrogen by a process called denitrification.

Kinza Khursheed said: (Nov 7, 2014)  
Plants converts soil into nitrates and then into nitrogen. I agree with @Zain Tanoli.

Saurav Pathak said: (Dec 18, 2014)  
If plants convert into free nitrogen. So from where does come out from the plant body?

Bhagya said: (Feb 1, 2015)  
Convert nitrates into ammonia for making amino acids.

Sikinder said: (Mar 13, 2015)  
I don't agree because, Nitrates in the soil gets converted to ammonia, am I correct?

Anmol said: (Mar 30, 2015)  
They ultimately convert it into N2.

Jawalika said: (Apr 14, 2015)  
Leguminous plants take nitrogen molecules from air and fix them in soil and convert them in to nitrates.

Ravi said: (Sep 7, 2015)  
The answer is ammonia.

Atmospheric nitrogen is converted into nitrate and nitrite forms by the free living (e.g. Azatobacter) or symbiotic bacteria (e.g: Rhizobium in root nodules of leeguminous plants). Plant roots then absorb nitrite form and subsequently convert it into ammonia.

Later on, ammonia is utilized for biosynthesis of nitrogen containing compounds like amino acids and nucleotides etc. When plant dies, the denitrifying bacteria act upon these compounds and free nitrogen can be released into atmosphere.

Sam said: (Dec 31, 2015)  
From my point of view:

When nitrogen in combine state with oxygen (No2), is brought to the ground through thunderstorm, nitrogen fixing bacteria's, like nitrosomers, nitrobacter, etc, in the root nodules of plant, convert it to nitrite and then to nitrogen. Thereby liberation oxygen making it absorb-able by plant.

Rechita Goyal said: (Oct 15, 2016)  
Nitrate and ammonium absorbed form of nitrogen in plants then nitrate convert into ammonium in the shoot which is used to synthesize amino acid and then protein not nitrogen.

Govardhan said: (Dec 19, 2016)  
I agree with the statement because nitrogen is very useful for the plant so nitrates may be converted into free nitrogen.

Somya said: (Dec 25, 2016)  
Please explain how does it converts?

Sushma said: (Feb 8, 2017)  
Could you please explain how it converts?

Abhishek said: (Jun 16, 2017)  
I think C option is correct.

Vaibhav said: (Sep 21, 2017)  
That is protein, see first byproducts of plant cycle. There is no need to plans converts nitrate to nitrogen. Free nitrogen is abundantly present in atm which does not directly use full to plant its need in absorption form.

Oje said: (Nov 19, 2017)  
No, because plant is not to supply nitrogen back to the atmosphere. Nitrogen can only be supplied back to the atmosphere by the process of denitrification by azontobacter. The nitrate absorbed by plant should be converted to a nitrogen-containing organic compound Eg: protein.

Promise said: (Nov 17, 2019)  
I don't agree I go for ammonia when talk about nitrification.

Justin Beiber said: (Dec 28, 2020)  
I can't understand it. Anyone explain it.

Grace Gyara said: (Jul 14, 2021)  
The answer is (C) Ammonia.

Upasana said: (Feb 16, 2022)  
Plants can never convert nitrate into free nitrogen. Only bacteria can do it.

Dr Sangeetha said: (Jul 19, 2022)  
The given answer is wrong.

The nitrogen present in nitrates is utilized by various biosynthetic pathways, to synthesise various nitrogen-containing biomolecules, like, amino acids, proteins, nucleic acids etc.

Plants neither release nor use molecular nitrogen directly.

Nitrogen is recycled into the atmosphere by soil bacteria acting on the organic matter in the soil by decomposition.

Atmospheric nitrogen is utilized only by nitrogen-fixing bacteria, which are symbiotic Or symbiotic like in root nodules of leguminous plants.

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