Multiple choice

Which of the following statements is/are correct?

  1. Nitrogen fixation also refers to biological conversions of nitrogen.
  2. Biological nitrogen fixation (BNF) occurs when atmospheric nitrogen (N2) is converted into ammonium sulphate (NH4) by an enzyme called nitrogenase.

  1. Only 1

  2. Only 2

  3. Both of these

  4. Neither of these
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A Correct answer
Explanation

Nitrogen fixation is a process by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3). Nitrogen fixation, natural and synthetic, is essential for all forms of life because nitrogen is required to biosynthesize basic building blocks of plants, animals and other life forms, e.g. nucleotides for DNA, RNA and amino acids for proteins. Nitrogen fixation also refers to other biological conversions of nitrogen, such as its conversion to nitrogen dioxide. Biological nitrogen fixation (BNF) occurs when atmospheric nitrogen is converted to ammonia by an enzyme called nitrogenase.

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