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Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare1 Mark
MCQ
Which of the following can use molecular nitrogen as nutrient?
  • A
    Methanomonas
  • B
    Mucor
  • C
    Rhizobium
  • D
    Spirogyra
✓

Answer

  1. Rhizobium

Explanation:

Rhizobium fixes the nitrogen symbiotically. The nitrogen-fixing bacteria enter the roots and lead to the incessant growth of the cortical cells which form nodules that act as a primary site for the nitrogen fixation. The enzyme nitrogenase is primarily used for the conversion of molecular nitrogen.

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