Nodules with nitrogen fixing bacteria are present in
- wheat
- cotton
- mustard
- gram
The Correct Option is D
Solution and Explanation
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Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Photosynthesis in higher plants
- Match the following column I with column II.
- AIIMS - 2019
- cloning
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- evolution
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
- Gravitation
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Transcription
Concepts Used:
Metabolism of Nitrogen
Nitrogen Cycle
The central part of nitrogen metabolism is the Nitrogen Cycle. A nitrogen molecule is made of two nitrogen atoms held together by a solid triple covalent bond (N ≡ N). There are three central pools of nitrogen – atmosphere, soil, and biomass.
Atmospheric Pool
The process of converting atmospheric nitrogen (N2) to ammonia (NH3) is called nitrogen fixation. Atmospheric nitrogen is rooted in three ways – biological, electrical, and industrial.
Soil Pool
The above processes rooted atmospheric nitrogen into the soil. This nitrogen is then taken up by plants and animals, accordingly.
Biomass Pool
When plants and animals die, the organic nitrogen within them has degraded to ammonia the process is ‘Ammonification‘ and it returns nitrogen back to the soil.