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This activity contains 20 questions.
Sterilization is the:
destruction of all forms of microbial life except endospores.
destruction of all life forms.
control of all microbial growth.
effective removal of all microbes on a surface.
same as sanitization.
An antiseptic is used when one needs to remove microbes from:
food preparation areas.
skin, prior to injection.
foods, prior to canning.
Foods to be canned need not be sterile. However, all
must be killed.
Some antimicrobial treatments kill microbes; some inhibit growth. Which term refers to an agent that inhibits bacterial growth?
Which of the following is
a major target for action of antimicrobials?
Decimal reduction time is the time in minutes in which
of the population at a given temperature will be killed.
a characteristic of the autoclave?
The use of moist heat.
The requirement for long (hours) exposure times.
The use of high pressures.
The ability to sterilize solutions with endospores.
The use of high temperatures.
Milk that you have never opened spoils in the refrigerator. A sample reveals the presence of microorganisms. The most likely explanation is:
the pasteurization process was ineffective.
the microbes that survived pasteurization were able to grow at 4 °C.
there was a leak in the milk carton that allowed microbes to enter.
pasteurization resistant mutants developed after pasteurization.
the microbes are pathogens.
Pasteurization was first used by Pasteur to control spoilage of:
Choose the best method for the sterilization of an enzyme solution.
The bactericidal effect of UV light is attributed to damage to:
Packages of milk and coffee creamers may be stored without refrigeration if they have been sterilized by:
ultra-high-temperature (UHT) treatment.
treatment with phenol.
high-temperature short-time (HTST) pasteurization.
All of the following methods are used for food preservation
Some microbes are very resistant to antimicrobial chemicals. Which of the following would be the easiest to kill?
Cysts of protozoa
Which type of radiation is
effective in killing microbes?
High-energy electron beams
The first disinfectant used by Lister was
Alcohol is most effective when used as a
All of the following are examples of microbial control using heavy metals
benzoyl peroxide used for acne treatment.
mouthwash solution containing zinc chloride.
algae control in swimming pools using copper sulfate.
burn treatment using silver-sulfadiazine ointment.
antiseptic solution containing mercurochrome.
is a compound found in antimicrobial soaps that targets gram-positive bacteria.
The following may be listed on the ingredients of your favorite snack food. Which of the following is
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