Question:
Given below are two statements regarding nitrogen fixation in plants.
Statement I - Nitrogen fixing bacteria use high energy to fix each molecule of nitrogen to form ammonia, which is an exothermic reaction.
Statement II - Chemoautotrophic bacteria obtain energy during nitrification of ammonia into nitrate, which is an endothermic reaction.
In the light of the above statements, select the correct option given below:
Given below are two statements regarding nitrogen fixation in plants.
Statement I - Nitrogen fixing bacteria use high energy to fix each molecule of nitrogen to form ammonia, which is an exothermic reaction.
Statement II - Chemoautotrophic bacteria obtain energy during nitrification of ammonia into nitrate, which is an endothermic reaction.
In the light of the above statements, select the correct option given below:
Statement I - Nitrogen fixing bacteria use high energy to fix each molecule of nitrogen to form ammonia, which is an exothermic reaction.
Statement II - Chemoautotrophic bacteria obtain energy during nitrification of ammonia into nitrate, which is an endothermic reaction.
In the light of the above statements, select the correct option given below:
Show Hint
A process that needs energy input is endothermic, and one that releases energy is exothermic.
Updated On: Nov 12, 2026
- Both statement I and statement II are correct.
- Both statement I and statement II are incorrect.
- Statement I is correct but statement II is incorrect.
- Statement I is incorrect but statement II is correct.
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Statement I
Nitrogen fixation by nitrogenase uses a large amount of ATP. A process that needs energy input is endothermic, not exothermic. So Statement I is incorrect.
Step 2: Statement II
Nitrification is the oxidation of ammonia to nitrite and then nitrate. These oxidations release energy, so the reaction is exothermic. Statement II is incorrect.
Step 3: Conclusion
Both statements are incorrect.
Final Answer:
Both statements are incorrect. \[ \boxed{\text{(B) }\text{Both statement I and statement II are incorrect.}} \]
Nitrogen fixation by nitrogenase uses a large amount of ATP. A process that needs energy input is endothermic, not exothermic. So Statement I is incorrect.
Step 2: Statement II
Nitrification is the oxidation of ammonia to nitrite and then nitrate. These oxidations release energy, so the reaction is exothermic. Statement II is incorrect.
Step 3: Conclusion
Both statements are incorrect.
Final Answer:
Both statements are incorrect. \[ \boxed{\text{(B) }\text{Both statement I and statement II are incorrect.}} \]
Was this answer helpful?
0
0
Top MHT CET Biology Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- Important sperm lysin used for dissolving egg covering is
- In biogas plant, the role of acidogenic bacteria is to
- In $C_{3}$ plants, the first stable product of photosynthesis during the dark reaction is
- In case of anaerobic respiration, the RQ is ___________
View More Questions
Top MHT CET metabolism of nitrogen Questions
- How many of the following are the symbiotic nitrogen fixing micro-organisms?
Rhizobium, Anabaena, Frankia, Azotobacter, Nostoc, Clostridium, Beijerinckia, Klebsiella - Which among the following represents the process of transamination?
- How many electrons and ATP are required for the biological fixation of a molecule of nitrogen to form ammonia?
- Nearly 80% of nitrogen found in human tissues originate from ____ nitrogen fixation.
- Bacteria involved in the given reaction of nitrogen cycle are
\(2\text{HNO}_{2}+\text{O}_{2}\rightarrow 2\text{HNO}_{3}\)
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions