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Home Microbiology Bacteriophages Comments

  • Question
  • __________ protein keeps the prophage dormant and prevents virus reproduction.


  • Options
  • A. Operator
  • B. Promotor
  • C. Repressor
  • D. Enhancer

  • Correct Answer
  • Repressor 


  • Bacteriophages problems


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    • 1. Area of lysis on a bacterial lawn culture produced by a phage is known as

    • Options
    • A. pock
    • B. plaque
    • C. pox
    • D. all of these
    • Discuss
    • 2. T-even phage binding to E. coli probably involves

    • Options
    • A. electrostatic interaction
    • B. hydrophobic interaction
    • C. covalent bonds
    • D. all of these
    • Discuss
    • 3. A bacterial defense mechanism against bacteriophage is called

    • Options
    • A. concatamerization
    • B. polymerization
    • C. restriction
    • D. lysogeny
    • Discuss
    • 4. The process by which phage reproduction is initiated in lysogenized culture is called

    • Options
    • A. infection
    • B. integration
    • C. repression
    • D. induction
    • Discuss
    • 5. Which of the following bacteria can be typed by phage typing method?

    • Options
    • A. Staphylococcus aureus
    • B. Salmonella typhi
    • C. Vibrio cholerae
    • D. All of these
    • Discuss
    • 6. In viruses with envelopes

    • Options
    • A. the envelope and the embedded proteins are encoded by the viral nucleic acid
    • B. the envelope is derived from the host but it contains embedded proteins coded by the viral nucleic acid
    • C. the envelope is coded by the viral nucleic acids, but the proteins come from the host's membrane proteins
    • D. the envelope and its imbedded proteins are derived from the host's membranes
    • Discuss
    • 7. West Nile virus can cause a disease in human beings that may be transmitted from an infected bird to a person by a mosquito. This is an example of

    • Options
    • A. endogenous infection
    • B. fomite borne disease
    • C. arthropod borne disease
    • D. nosocomial infection
    • Discuss
    • 8. Intracytoplasmic inclusion bodies are found in cells infected with

    • Options
    • A. Rabies virus
    • B. Vaccinia virus
    • C. Fowlpox virus
    • D. all of these
    • Discuss
    • 9. The predominant lipid substance found in the viral envelope is

    • Options
    • A. phospholipids
    • B. glycolipids
    • C. neutral fat
    • D. all of these
    • Discuss
    • 10. Which type of interferon is produced by T lymphocytes?

    • Options
    • A. ?
    • B. ?
    • C. ?
    • D. ? and ?
    • Discuss


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