Molecular Basis of Inheritance


  1. In a DNA percentage of thymine is 20% then what will be the percentage of guanine?









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    According to Chargaff's rule, the ratio of purine bases to pyrimidine bases is equal. A = T, C = G. If T is 20% then A is 20% and C and G are 30%, 30%

    Correct Option: C

    According to Chargaff's rule, the ratio of purine bases to pyrimidine bases is equal. A = T, C = G. If T is 20% then A is 20% and C and G are 30%, 30%


  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.



  1. Which form of RNA has a structure resembling clover leaf?









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    rRNA occurs inside ribosomes. m RNA carries information from DNA to polypeptides. hnRNA are heterogenous nuclear RNA.

    Correct Option: D

    rRNA occurs inside ribosomes. m RNA carries information from DNA to polypeptides. hnRNA are heterogenous nuclear RNA.


  1. Extranuclear inheritance occurs in









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    In eukaryotic cells, two cytoplasmic organelles, mitochondria and chloroplast of green plants, contain their own genetic materials.

    Correct Option: B

    In eukaryotic cells, two cytoplasmic organelles, mitochondria and chloroplast of green plants, contain their own genetic materials.



  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.