Question:

The enzyme responsible for atmospheric nitrogen fixation is:

Updated On: Apr 6, 2023
  • nitrogenize
  • hydrogenase
  • oxygenase
  • carboxylase
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The Correct Option is A

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Enzyme nitrogenase plays a key role in $N _{2}$ fixations and remains active only during anaerobic condition. It is made up of two protein subunits : (i) non-heme iron protein or Fe-protein or dinitrogen reductase. (ii) Iron molybdenum protein or Mo-Fe protein or dinitrogenase.
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The right answer is A) Nitrogen is the most prevalent gas in the environment, yet plants cannot utilize it in its natural state. The majority of nitrogen found in nature resides in a diatomic gaseous state that is inaccessible to plants. Utilized by plants is decreased or fixed nitrogen. An essential nitrogen-fixing enzyme called nitrogenase is present in bacteria that inhabit the root nodules of leguminous plants.

 

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Concepts Used:

Surface Chemistry

The study of the chemical phenomena that occur at the interface of two surfaces which can be solid-liquid, solid-gas, solid-vacuum, liquid-gas, etc. 

Read Also: Surface Chemistry

Applications of surface chemistry are:

Adsorption:

The process of attraction and aggregation of the molecules of a substance on the surface of a solid is known as adsorption. For Example, N2 adsorbs on the surface of activated charcoal

Two types of adsorption are:-

  • Chemisorption: It is also known as Chemical Adsorption.
  • Physisorption: It is also known as Physical Adsorption.

Corrosion:

The process through which the refined metals convert themselves into more stable compounds is known as corrosion.

Crystallisation:

The type of technique used in order to purify the substances to separate Solids from liquids is known as crystallisation.

Heterogeneous Catalysis:

The process wherein a catalyst is used in order to increase the rate of a chemical reaction is known as catalysis. The catalyst does not undergo any transformation and can be recovered in a chemically unchanged state. 

There are two types of catalysis:-

  • When the catalyst involved and the reacting substances are same states of matter or in the same phase, it is known as Homogeneous Catalysis.
  • When the catalyst involved and the reacting substances are in different states of matter or different phases, it is known as Heterogeneous Catalysis.