VMMC VMMC Medical Solved Paper-2005

  • question_answer
    Autoradiography technique was used to :

    A)  trace the path of carbon in photosynthesis

    B)  establish that the oxygen evolved during phtosynthesis is by photolysis of water molecule

    C)  study photorespiration in certain plants

    D)  find out the absorption maximum of chlorophyll pigments

    Correct Answer: B

    Solution :

    Autoradiography is a sensetive method for tracing radio labeled molecules. Ruben, Kamen and Hassid observed that oxygen evolved during photosynthesis comes from water and not from \[C{{O}_{2}}\]. For this they used water with heavy isotope of oxygen \[({{O}^{18}})\].


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