Mastering Microbial Control

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Questions and Answers

Which method of heat sterilization is preferred when sterilizing glassware to avoid any residual moisture that can contaminate the surface?

  • Autoclaving
  • Hot-air oven sterilization (correct)
  • Incineration
  • Boiling

What is the minimal time necessary for killing a population at a given temperature called?

  • Thermal death point
  • Dry heat
  • Decimal reduction time
  • Thermal death time (correct)

Which heat sterilization method kills bacteria by oxidizing cellular components?

  • Hot-air oven sterilization
  • Boiling
  • Incineration (correct)
  • Autoclaving

Which heat sterilization method is slower than moist heat?

<p>Autoclaving (C)</p> Signup and view all the answers

Which heat sterilization method requires long periods of exposure to high temperatures?

<p>Hot-air oven sterilization (A)</p> Signup and view all the answers

Which heat sterilization method is preferred for metallic medical instruments?

<p>Autoclaving (C)</p> Signup and view all the answers

Which heat sterilization method kills bacteria by coagulating/denaturing proteins?

<p>Boiling (C)</p> Signup and view all the answers

Which heat sterilization method requires less energy than oxidation?

<p>Boiling (A)</p> Signup and view all the answers

Which heat sterilization method can be used at a lower temperature and shorter exposure time than dry heat?

<p>Boiling (A)</p> Signup and view all the answers

Which heat sterilization method is used for blankets, bedding, and utensils?

<p>Autoclaving (C)</p> Signup and view all the answers

Which method of microbial control involves the complete destruction/removal of all living microbes, spores, and viruses on an object or in an area?

<p>Sterilization (B)</p> Signup and view all the answers

What is the term for an inanimate object that serves to transmit disease?

<p>Fomite (A)</p> Signup and view all the answers

Which type of microbial control method significantly reduces microbial numbers by using mild chemicals and gentle scrubbing of a small area of skin or tissue to avoid the transmission of pathogenic microbes?

<p>Degerming (D)</p> Signup and view all the answers

Which term refers to the application of chemicals for the removal of potential pathogens from living tissue?

<p>Antiseptic (B)</p> Signup and view all the answers

What is the term for a chemical that destroys bacteria?

<p>Bactericide (C)</p> Signup and view all the answers

What is the term for a chemical that inhibits/prevents the growth of bacteria?

<p>Bacteriostatic (B)</p> Signup and view all the answers

What is the term for a chemical that destroys fungi?

<p>Fungicide (B)</p> Signup and view all the answers

What is the term for a chemical that inhibits/prevents the growth of fungi?

<p>Fungistatic (D)</p> Signup and view all the answers

What is the term for a chemical that destroys viruses?

<p>Viricide (D)</p> Signup and view all the answers

What is the term for a chemical that destroys spores?

<p>Sporocide (C)</p> Signup and view all the answers

Which method is commonly used for ultra pasteurization?

<p>140oC for 3 seconds (A)</p> Signup and view all the answers

What is the temperature range for a freezer?

<p>~-18oC (D)</p> Signup and view all the answers

Which method is used to remove microorganisms from a solution or gas?

<p>Filtration (A)</p> Signup and view all the answers

What is the purpose of salting in the process of desiccation?

<p>To induce water diffusion (D)</p> Signup and view all the answers

What type of radiation is used to sterilize heat-sensitive pharmaceuticals?

<p>Ionizing radiation (B)</p> Signup and view all the answers

What is the most destructive wavelength of nonionizing radiation?

<p>265nm (B)</p> Signup and view all the answers

What happens to DNA when it absorbs sufficient UV light?

<p>It forms thymine dimers (C)</p> Signup and view all the answers

What is the main effect of microwaves on food?

<p>To cook the food (C)</p> Signup and view all the answers

What is the purpose of filtration using a HEPA filter?

<p>To trap microorganisms (A)</p> Signup and view all the answers

What is the purpose of membrane filtration?

<p>To count the number of microorganisms in a solution (A)</p> Signup and view all the answers

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