Biotechnology and its Applications


  1. Which one of the following vectors is used to replace the defective gene in gene therapy?









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    Adenovirus is non-enveloped dsDNA virus which cause respiratory diseases. Adenovirus is used as a vehicle to administer targeted therapy in the form of recombinant DNA or protein. Specific modifications on fibre proteins are used to target adenovirus to certain cell types, a major effort is made to limit hepatotoxicity and prevent multiple organ failure.

    Correct Option: B

    Adenovirus is non-enveloped dsDNA virus which cause respiratory diseases. Adenovirus is used as a vehicle to administer targeted therapy in the form of recombinant DNA or protein. Specific modifications on fibre proteins are used to target adenovirus to certain cell types, a major effort is made to limit hepatotoxicity and prevent multiple organ failure.


  1. The first human hormone produced by recombinant DNA technology is:









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    Mammalian hormones were among the first products prepared in bacteria by r-DNA technology. Human insulin and human growth hormone are earliest examples.

    Correct Option: A

    Mammalian hormones were among the first products prepared in bacteria by r-DNA technology. Human insulin and human growth hormone are earliest examples.



  1. One of the most important reasons why wild plants should thrive is that they are good sources of









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    Wild varieties have the genes for the resistance to disease and pests.

    Correct Option: C

    Wild varieties have the genes for the resistance to disease and pests.


  1. Bacillus thuringiensis (Bt) strains have been used for designing novel:









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    Bt cotton, a transgenic crop variety has been introduced in India. The Bt cotton variety contains a foreign gene obtained from Bacillus thuringiensis. This bacterial gene protects cotton from the ball worm, a major pest of cotton.

    Correct Option: D

    Bt cotton, a transgenic crop variety has been introduced in India. The Bt cotton variety contains a foreign gene obtained from Bacillus thuringiensis. This bacterial gene protects cotton from the ball worm, a major pest of cotton.