Multiple Choice Questions

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DNA and RNA segment tagged wit  a radioactive molecule is called

  • vector

  • probe

  • clone

  • clone


B.

probe

The probe is a defined nucleic acid molecule that can be used in molecular hybridization sequence that is complementary to it, by virtue of a label carried by the probe. The label may be radioactive or non- radioactive. Nucleic acid probes have a wide range of applications such as in the detection of microorganisms in clinical specimens, in food and water samples, in the detection of genetic diseases, etc.

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The unequivocal proof of DNA as the genetic material came from the studies on a 

  • bacterium

  • fungus

  • viroid

  • viroid

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Which one of the following palindromic base sequences in DNA can be easily cut at about the middle be some particular restriction enzyme?

  • 5'-CGTTCG -3'
    3'-ATCCTA-5'

  • 5'-GATATG-3'
    3'-CTACTA-5'

  • 5'-GAATTC-3'
    3'CTTAAG-5'

  • 5'-GAATTC-3'
    3'CTTAAG-5'

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Which one of the following techniques made it possible to genetically engineer living organism

  • Recombinant DNA techniques

  • X -ray diffraction

  • Heavier isotope labelling

  • Heavier isotope labelling

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Which one of the following is used as a vector for cloning the gene into higher organisms?

  • Baculovirus

  • Salmonella typhimurium

  • Rhizopus nigricans

  • Rhizopus nigricans

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Which one of the following also acts as a catalyst in a bacterial cell?

  • sn RNA

  • hn RNA

  • 23 S rRNA

  • 23 S rRNA

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Satellite DNA is useful tool in 

  • Organ transplantation

  • sex determination

  • forensic science

  • forensic science

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The one aspect which is not a salient feature of genetic code is its being

  • degenerate

  • ambiguous

  • universal

  • universal

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Genetic engineering has been successfully used for producing

  • transgenic mice for testing safety to polio vaccine before use in humans

  • transgenic models for studying new treatments for certain cardiac diseases

  • transgenic cow -Rosie which produces high-fat milk for making ghee

  • transgenic cow -Rosie which produces high-fat milk for making ghee

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Silencing of mRNA has been used in producing transgenic plants resistant to

  • bollworms

  • nematodes

  • White rusts

  • White rusts

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