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    Question

    Microbe involved in biological oxidation of ammonium ion to nitrite ion is

    A Rhizobium Correct Answer Incorrect Answer
    B Azotobacter Correct Answer Incorrect Answer
    C Nitrobacter Correct Answer Incorrect Answer
    D Nitrosomonas Correct Answer Incorrect Answer
    E Azospirillum Correct Answer Incorrect Answer

    Solution

    Conversion of ammonium ion to nitrite ion is done by nitrosomonas during nitrification.

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