BMS 212 exam 2 mastering questions chapter 9

Classical pasteurization heats the fluid to about ___∘С for a time of about___

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Classical pasteurization heats the fluid to about ___∘С for a time of about___

Geogemma barossii is a hyperthermophilic archaeon that grows near hydrothermal vents in the ocean at temperatures as high as 121∘С. What effect would standard autoclaving have on this microbe?

boiling for 10 minutes does not kill:

Heating a broth culture of microorganisms to 140∘C for three seconds would ___ the culture.

What microbial structures are the most resilient forms of life?

bacterial endospores

A broth containing 1 million bacterial cells is treated with an antimicrobial agent that kills 90% of the cells in 1 minute. What is the minimum amount of time it will take before all the cells in the broth are dead?

A chemical agent that dissolves lipids can damage:

cells and enveloped viruses

Which of the following could be used to sterilize a heat-sensitive liquid?

Formalin (37% formaldehyde) is used for

both disinfection and sterilization

A nurse rubbing a section of skin with an alcohol pad prior to an injection is an example of _____.