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Home Biotechnology Recombinant DNA Comments

  • Question
  • Problems in obtaining large amounts of proteins encoded by recombinant genes can often be overcome by using


  • Options
  • A. BACS
  • B. expression vectors
  • C. YACS
  • D. all of these

  • Correct Answer
  • expression vectors 


  • Recombinant DNA problems


    Search Results


    • 1. Agrobacterium tumefaciens is

    • Options
    • A. a disease in humans that causes loss of sight
    • B. a bacterium that can be used to introduce DNA into plants
    • C. a fungi that is used to produce antibiotics in large amounts
    • D. a disease in humans that causes loss of weight
    • Discuss
    • 2. Bacterial cells protect their own DNA from degradation by restriction endonucleases by

    • Options
    • A. methylating the DNA at the sites that the enzyme recognizes
    • B. deleting all recognition sites from the genome
    • C. not producing any restriction endonucleases
    • D. having anti restriction endonucleases
    • Discuss
    • 3. A genomic library is

    • Options
    • A. a database where the sequence of an organism's genome is stored
    • B. a collection of many clones possessing different DNA fragments from the same organisms bound to vectors
    • C. a book that describes how to isolate DNA from a particular organism
    • D. a place where the information of the genetic organization of organisms are kept.
    • Discuss
    • 4. Which of the following is obtained using processed mRNA molecules as a template?

    • Options
    • A. rDNA
    • B. mDNA
    • C. cDNA
    • D. tDNA
    • Discuss
    • 5. Which of the following enzyme is used to covalently bond foreign DNA to a vector plasmid?

    • Options
    • A. DNA polymerase
    • B. Restriction endonuclease
    • C. DNA ligase
    • D. DNA helicase
    • Discuss
    • 6. Vectors are

    • Options
    • A. molecules that degrade nucleic acids
    • B. molecules that help in replication
    • C. molecules that are able to covalently bond to and carry foreign DNA into cells
    • D. molecules that protect host cells from invasion by foreign DNA
    • Discuss
    • 7. Enzymes that recognize and cleave specific 4 to 8 base pair sequences of DNA are

    • Options
    • A. DNA ligase
    • B. helicases
    • C. restriction endonucleases
    • D. DNA gyrase
    • Discuss


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