Identify the Genes in nitrogen-fixing bacteria

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TNUSRB SI Official Paper (Held on 24 June 2012)
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  1. Nif Genes 
  2. DNA Genes 
  3. Poly Genes 
  4. RNA Genes 

Answer (Detailed Solution Below)

Option 1 : Nif Genes 
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Detailed Solution

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The correct answer is Nif Genes.

 Key Points

  • Nif genes, found in nitrogen-fixing bacteria, are responsible for the production of enzymes that convert atmospheric nitrogen into a usable form for the host plant.
  • Nitrogen fixation is a critical process in the nitrogen cycle, converting atmospheric nitrogen (N2) into ammonia (NH3), which can be used by plants to make amino acids, proteins, and other essential molecules.
  • The nitrogenase enzyme, responsible for this conversion, is coded by the nif genes.
  • Some common nitrogen-fixing bacteria that contain nif genes include Rhizobium, Azotobacter, and Cyanobacteria.

 Additional Information

  • There are no such things as "DNA genes" or "RNA genes". Genes are segments of DNA that code for proteins or functional RNA molecules.
  • The term "polygenes" usually refers to genes that contribute to a polygenic trait. Polygenic traits are those traits that are controlled by more than one gene, such as skin color or height in humans. This term doesn't refer to a specific set of genes in nitrogen-fixing bacteria.

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