Physical and chemical

All microbicidal agents are sterilants.

• True

• False

Bacteriostatic agents kill bacterial cells.

• True

• False

Prions require more extensive methods of sterilization than are needed for bacterial endospores.

• True

• False

The presence of organic matter such as saliva and pus can interfere with the actions of disinfectants.

• True

• False

When a control agent targets the metabolic processes of microbial cells, active younger cells typically die more rapidly than older cells.

• True

• False

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

• True

• False

Most microbial contaminants of food are killed or inactivated at freezing temperatures.

• True

• False

Pasteurization is used to sterilize milk.

• True

• False

Pasteurization does not inactivate endospores or thermoduric microbes.

• True

• False

Ionizing radiation is more effective than non-ionizing radiation in killing or inactivating microbes.

• True

• False