Exam 9: Physical and Chemical Control of Microbes

Which of the following acids is not used to destroy or inhibit microbial cells in food?

A microorganism that is not motile and has stopped metabolizing could be considered dead.

Analine dyes, like crystal violet, have antimicrobial activity particularly against gram-positive bacteria and some fungi.

Surfactants work by ________.

The shortest time required to kill all the microbes in a sample at a specified temperature is called the ________.

Pseudomonas is resistant to soaps.

HEPA filters are used to remove microbes from ________.

A cleansing method that mechanically removes microbes and other debris to reduce contamination is ________.

Hydrogen peroxide can be ________.

Aldehyde-based compounds, while effective sterilants, can be unstable and costly to use.

Which of the following scenarios are most appropriate for handwashing with an alcohol-based hand cleanser instead of soap and water?

Which of the following is not a factor that affects germicidal activity?

Microbicidal agents are sterilants.

Ionizing radiation is more effective than nonionizing radiation in killing microbes.

Soaps and detergents are very effective as sterilants.

Alcohols are more effective at inactivating enveloped viruses than naked viruses.

The easiest microbial forms to kill or inhibit are ________.

Which is correct regarding the rate of microbial death?

Which of the following does not affect microbial nucleic acids?

The process of using a cleansing technique to mechanically remove and reduce microorganisms and debris to safe levels is ________.