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Physical and Chemical Agents

Physical and Chemical Agents
Which of the following material is sterilized by use of red heat?

All-glass syringes
Inoculating wires and loops
Glass slides
Soiled dressings

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Physical and Chemical Agents
Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have

toxic alkaline chemicals
insufficient nutrients
high concentration of solutes
low pH

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Physical and Chemical Agents
Microbes can be removed from a liquid solution by the process of

desiccation
osmosis
freeze-drying
filtration

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

antiseptic
bacteriostatic agent
sanitizer
disinfectant

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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?

Acidophile
Mesophile
Obligate Aerobe
Obligate Anaerobe

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Physical and Chemical Agents
Which of the following substances can sterilize?

Chlorine
Cetylpyridinium chloride
Alcohol
Ethylene oxide

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