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Physical and Chemical Agents

Physical and Chemical Agents
A(n)____is used to prevent infection by killing or inhibiting pathogen growth on animal tissues.

disinfectant
sanitizer
antiseptic
bacteriostatic agent

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Physical and Chemical Agents
The process of making an object free from living organisms including bacterial and fungal spores and viruses is known as

pasteurization
antisepsis
disinfection
sterilization

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Physical and Chemical Agents
Preservation of foods by using salts and sugars works by

creating a hypotonic environment
raising pH
creating a hypertonic environment
lowering osmotic pressure

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Physical and Chemical Agents
Bactericidal concentration of phenol is

0.75%
1%
0.5%
0.25%

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Physical and Chemical Agents
If a canning procedure is not properly followed, which type of microbe is most likely to grow in the canned food?

Obligate Anaerobe
Obligate Aerobe
Mesophile
Acidophile

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Physical and Chemical Agents
Which of the following methods will not sterilize?

Aqueous glutaraldehyde for 10 hours
Dry heat at 171°C for 1 to 2 hours
100°C boiling water for 30 minutes
121°C at 15 lb/in pressure for 15 to 20 minutes

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