CBSE  /  Class 12  /  Biology  /  Biotechnology: Principles and Processes

  • 1. 
    Transgenic plants are develop by:

  • Introducing of foreign fenes
  • Clone and genetically modified genes
  • Genetic engineering
  • Purified genes

  • 2. 
    Two microbes found to be very useful in genetic, engineering are:

  • Escherichiya Coli and Agrobacterium tumefaciens
  • Virbio chloerae and tailed bacteriophage
  • Diplococcus sp and pseudomonas sp.
  • None of these

  • 3. 
    Who discovered Restricted endonucleas enzymes?

  • Smith and Nathane
  • Baiger
  • Waxman
  • Fleming

  • 4. 
    DNA obtained for DNA finger printing:

  • W.B.C. (b) Hair root cells

  • 5. 
    Two microbes found tb be very useful in Genetic Engineering are:

  • Excherichia coli and Agrobacterium tumefaciens
  • Vibrio cholarae and a tailed bacteriophage
  • Diplococcus sp. and Pseudomonas sp. (d) Crown gall bacterium and Caenorhabdities elegans

  • 6. 
    Plasmid is a:

  • Fungus
  • Plasmid
  • Part of Plasma membrane
  • Extra chromosomal DNA in bacterial cell

  • 7. 
    Restriction endonuclease cuts:

  • One stand of DNA at specific site
  • Both strands of DNA
  • Both strands of DNA at any site
  • Single strand of RNA

  • 8. 
    Restrictipn endonucleases are most widely used in recombinant DNA technology. They are obtained from :

  • Plasmids
  • AH prokaryotic cells
  • Bacteriophages
  • Bacterial cells

  • 9. 
    Golden rice is a promising transgenic crop. When released for cultivation, it will help in :

  • High lysin content
  • Pest resistance
  • High protien content
  • High vitamin A content

  • 10. 
    Triticale, first man made cereal crop, has been obtained by crossing wheat with:

  • Rye
  • Pearl millet
  • Sugarcane
  • Barley
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