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Physical and Chemical Agents

Physical and Chemical Agents
Complete destruction of the microorganisms is commonly known as

none of these
sterilization
disinfection
antisepsis

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

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

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Physical and Chemical Agents
Which of the following was the first widely used antiseptic and disinfectant?

Iodine
Chlorine
Phenol
Alcohol

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Physical and Chemical Agents
The time required to kill 90% of the microorganisms in a sample at a specific temperature is the

decimal reduction time
F value
D value
thermal death point

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Physical and Chemical Agents
The organisms retained in the fluids filtered by Seitz filter is

None of these
Clostridium
Proteus
Staphylococcus

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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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