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    Biology
    Grade-8
    Easy

    Question

    Which of the following is TRUE in case of Urey-Miller experiment?

    1. Life on early Earth evolved from outer space
    2. Amino acids can be formed from inorganic molecules
    3. Cells survived in the primitive atmosphere
    4. Simple cells can be created in a laboratory

    Hint:

    Amino acids are formed from inorganic molecules

    The correct answer is: Amino acids can be formed from inorganic molecules

      • Urey and Miller conducted the experiment to explain the origin of life on earth
      • They were of the opinion that earth's early atmosphere was able to produce amino acids from the inorganic matter 
      • They made use of the gases like Nathan,  ammonia,  nitrogen,  hydrogen that they thought to be present on the early earth 
      • Electric discharge was used to simulate the lightening present at that time 
      • They observed the formation of amino acids in the broth.
      • Thus it was proved that organic substances were producing from inorganic compounds. 
      • Chemical evolution preceded biological evolution 

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      Urey and Miller performed their experiment for explaining the origin of life, in which year?

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