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Molecular Basis...

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  • Question 1
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    Which of the following statements is true about DNA replication?

  • Question 2
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    Beadle and Tatum showed that each kind of mutant bread mould they studied lacked a specific enzyme. Their experiments demonstrated that

  • Question 3
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    A single strand of nucleic acid tagged with a radioactive molecule is called?

  • Question 4
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    A phenomenon where the third base of t-RNA at its 5’ end can pair with a non-complementary base of m-RNA is called?

  • Question 5
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    What does A & B represent?

       

  • Question 6
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    Degeneracy of genetic code is due to

  • Question 7
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    A DNA segment which serves as a kind of “ON-OFF switch” for transcription is a/an

  • Question 8
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    Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it?

  • Question 9
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    During translation initiation in prokaryotes, a GTP molecule is needed in

  • Question 10
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    Why are UGA, UAG and UAA called termination codons?

  • Question 11
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    Removal of introns and joining of exons in a defined order during transcription is called?

  • Question 12
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    What does "lac" refer to in what we call the lac operon?

  • Question 13
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    The sequence of structural gene in lac operon concept is

  • Question 14
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    What does X replesent in the followwing diagram:

  • Question 15
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    Autoradiogram of VNTR probe gives many band of different size. It differ from individual to individual except

  • Question 16
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    In human genome project, commonly used host were bacteria and yeast and their vectors are called as

  • Question 17
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    Assertion: Genetic map up of an organism or individual lies in the DNA sequence.

    Reason: If two individual differs, then their DNA sequence should also be different.

  • Question 18
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    Rice genome projects includes
    a. Fingerprinting of HindIII and Eco RI.
    b. Assembly of the fingerprinted BACs into contigs.

  • Question 19
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    Genetic and physical map of genome was generated using information on
    a. Polymorphism of restriction endonuclease recognition sites.
    b. Repetitive DNA sequence called microsatellites.

  • Question 20
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    In human genome project, commonly used host were bacteria and yeast and their vectors are called as

  • Question 21
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    DNA is made of two chains that twist about one another in the shape of a _______.

  • Question 22
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    Assertion: UAA codon is a termination codon.

    Reason: If in a mRNA, a termination codon is present, the protein synthesis stops abruptly whether the protein synthesis is complete or not.

  • Question 23
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    The sensitivity of fingerprinting technique has been increased by use of

  • Question 24
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    Statement I: DNA finger printing is highly reliable method of identification of individual involved in crimes.
    Statement II: DNA a fingerprinting is a sure method in solving paternity and maternity disputes.
    Statement III: DNA fingerprinting can be used to cure HIV infection.

  • Question 25
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    The hybridization of probes having radioactive isotopes with various sequence of nitrogen bases with ssVNTR is called?

  • Question 26
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    Assertion: VNTR of two persons may be similar at certain sites but could be different at other sites.

    Reason: A child inherits 50% of chromosomes from mother and remaining 50% from father.

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