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Question

Which of the following is responsible for biological nitrogen-fixation?

A
Nif gene
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B
Nitrogenase
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C
Yeast alanin tRNA synthetase
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D
RNA synthetase
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Solution

The correct option is A Nif gene
  • The nitrogen fixation enzymes are encoded by nif genes that are present in both free-living and symbiotic nitrogen-fixing bacteria.
  • Primary nitrogen fixation enzyme is nitrogenase complex.
  • Yeast alanine tRNA synthetase binds alanine to respective tRNA.
  • RNA synthetase enzyme catalyzes RNA synthesis in RNA viruses.
So, the correct answer is option A.

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