UPSC General Studies Sample Paper General Studies Sample Paper-5

  • question_answer
    Bioremediation is now a popular work in. maintenance of nature's overall ecological balance.
    Consider the following statements.
    1. Bioremediation is the use of living organism (primarily microorganisms) for removal of a pollutant from the biosphere.
    2. Basic principle of bioremediation is natural attenuation which is a natural process occur in the environment to reduce toxicity or concentration of contamination without anthropogenic intervention.
    3. Bioremediation is less costly than conventional remediation strategies and no waste accumulated after elimination of contaminants and contaminants are also not transported from its location.
    Which of the statement(s) given above is/are correct?

    A)  1 and 2

    B)                     2 and 3            

    C)  Only 1             

    D)  All of these

    Correct Answer: D

    Solution :

    [d] Bioremediation is the use of microorganisms for removal of pollutants from biosphere, a species of pseudomonas is found by Japaneses that can grow in a contaminated condition of more than 50% tolceine and degrade toxics. A hybrid variety of pseudomonas is developed to degrade oil spill marine pollutions. Basic principle of bioremediation is natural attenuation that the organisms florish naturally without human intervention. It is less costly than traditional agents and not produce any by product and also not transport or relocate the contaminants. Bioremediation is now also used to produce biogas from toxic elements and also used for degradation of synthetic elements like nylon and polythene.

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