Molecular Basis of Inheritance


  1. The two polynucleotide chains in DNA are









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    The two chains are antiparallel, one aligned in 5’→3’ direction the other in 3’ → 5’ direction.

    Correct Option: B

    The two chains are antiparallel, one aligned in 5’→3’ direction the other in 3’ → 5’ direction.


  1. Which antibiotic inhibits interaction between RNA and mRNA during bacterial protein synthesis?









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    Neomycin is the antibiotic which inhibits the translation of bacterial cell so that it can not affect the host cell.

    Correct Option: A

    Neomycin is the antibiotic which inhibits the translation of bacterial cell so that it can not affect the host cell.



  1. The following ratio is generally constant for a given species:









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    According to Chargaff purines and pyrimidines are in equal amounts. Purine (adenine) is equimolar with pyrimidine (thymine) and purine (guanine) is equimolar with pyrimidine (cytosine).

    Base ratio
    A + T
    is specific for species.
    C + G

    Correct Option: C

    According to Chargaff purines and pyrimidines are in equal amounts. Purine (adenine) is equimolar with pyrimidine (thymine) and purine (guanine) is equimolar with pyrimidine (cytosine).

    Base ratio
    A + T
    is specific for species.
    C + G


  1. DNA template sequence of CTGATAGC is transcribed over mRNA as









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    During transcription, from the DNA template complementary mRNA is formed and thymine is replaced by uracil.

    Correct Option: B

    During transcription, from the DNA template complementary mRNA is formed and thymine is replaced by uracil.



  1. Transformation experiment was first performed on which bacteria?









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    Transformation is change in genetic material of an organism by obtaining genes from outside.

    Correct Option: B

    Transformation is change in genetic material of an organism by obtaining genes from outside.