UPSC General Studies Sample Paper General Studies Sample Paper-4

  • question_answer
    Consider the following statements.
    1. Atmospheric nitrogen is converted to simpler forms only by nitrogen fixing bacteria and not by any other method.
    2. Nitrogen is essential in the formation of carbohydrates, and fats in human bodies and plants.
    Which of the statement(s) given above is/are correct?

    A)  Only 1             

    B)  Only 2             

    C)  Both 1 and 2                

    D) (d) Neither1nor 2

    Correct Answer: D

    Solution :

    [d] Nitrogen gas makes up 78% of our atmosphere and nitrogen is also a part of many molecules essential to life like proteins, nucleic acids (DNA and RNA) and some vitamins. Nitrogen is found in other biologically important compounds such as alkaloids and urea too. During lightning, the high temperatures and pressures created in the ai convert nitrogen into oxides of nitrogen. These oxides dissolve in water to give nitric and nitrous acids and fall on land along with rain. These are then utilised by life-forms on the Earth.

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