Microbiology Disinfection Methods Quiz
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Questions and Answers

What type of radiation is considered a form of cold sterilization?

  • Ultraviolet Rays
  • Beta Rays
  • Infrared Rays
  • Gamma Rays (correct)
  • Which of the following is NOT a characteristic of HEPA filters?

  • Works only for liquid applications (correct)
  • Traps small, harmful particles
  • Requires frequent replacement
  • Uses electrostatic attraction for filtration
  • What is the primary action of chemical agents like chlorine dioxide gas?

  • Inhibits protein synthesis
  • Releases free radicals
  • Decomposes organic matter
  • Sterilizes medical equipment and surfaces (correct)
  • Which chemical agent is an example of a phenolic compound used in disinfection?

    <p>Triclosan</p> Signup and view all the answers

    Which factor does NOT affect the germicidal activity of chemical agents?

    <p>Color of the liquid solution</p> Signup and view all the answers

    What is the standard mode of action for nonionizing radiation like ultraviolet rays?

    <p>Forms pyrimidine dimers</p> Signup and view all the answers

    What is an important consideration when using liquid disinfectants such as iodine?

    <p>They can damage human tissues</p> Signup and view all the answers

    What is the primary function of filters in liquid applications?

    <p>To remove specific contaminants based on pore size</p> Signup and view all the answers

    What is the primary function of Betapropiolactone?

    <p>To inactivate viruses</p> Signup and view all the answers

    What action do quaternary ammonium compounds commonly perform?

    <p>They serve as detergents and disinfectants</p> Signup and view all the answers

    Which group of antimicrobial agents is known for blocking cell wall synthesis?

    <p>Penicillin and its relatives</p> Signup and view all the answers

    What is the main mechanism of action for rifampin in antimicrobial therapy?

    <p>To block RNA synthesis</p> Signup and view all the answers

    Which of the following compounds exerts lethality upon microorganisms in extremely small amounts?

    <p>Oligodynamic compounds</p> Signup and view all the answers

    What is the role of aminoglycosides in antimicrobial therapy?

    <p>Interfere with protein synthesis</p> Signup and view all the answers

    Which drug is known as an antimetabolite that blocks metabolic pathways?

    <p>Trimethoprim</p> Signup and view all the answers

    What type of action do phenol compounds typically exhibit in antimicrobial applications?

    <p>Cell membrane disruption</p> Signup and view all the answers

    What is the primary purpose of a germicide?

    <p>To kill pathogens</p> Signup and view all the answers

    Which of the following methods is most effective for sterilization using moist heat?

    <p>Autoclaving</p> Signup and view all the answers

    How does dry heat sterilization primarily differ from moist heat sterilization?

    <p>Dry heat requires longer exposure times</p> Signup and view all the answers

    What is the main effect of refrigeration on microorganisms?

    <p>It inhibits their growth</p> Signup and view all the answers

    In which scenario would dry heat ovens typically be used for sterilization?

    <p>Sterilizing metal and glass instruments</p> Signup and view all the answers

    Which of the following is a key factor that affects the death rate of microorganisms?

    <p>Activity of the antimicrobial agent</p> Signup and view all the answers

    What is the principle of pasteurization?

    <p>To increase the temperature for a short duration</p> Signup and view all the answers

    What is the effect of desiccation on microorganisms?

    <p>It inhibits growth by removing water</p> Signup and view all the answers

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