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NEET Biology Molecular basis of Inheritance / विरासत का आणविक आधार Question Bank Nucleic acid (DNA/RNA)

  • question_answer
    A DNA molecule in which both strands have radioactive thymidine is allowed to duplicate in an environment containing non-radioactive thymidine. What will be the correct number of DNA molecules that contain some radioactive thymidine after three duplications [AIIMS 1980; DPMT 1993]

    A) There will be four such molecules

    B) There will be eight such molecules

    C) There will be only one such molecule

    D) There will be two such molecules

    Correct Answer: D

    Solution :

    Because of semiconservative method of DNA replication only 2 molecules of DNA will have some radioactive thymidine.


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