Microbial (quiz)

Physical agents to prevent bacterial growth include Select one: a. pasteurization, freezing, phages b. irradiation, probiotics, filtration c. autoclaving, irradiation, freezing d. antibiotics, refrigeration, pasteurization

c. autoclaving, irradiation, freezing

Sterilization refers to the Select one: a. killing of all microbes except for viruses b. elimination of pathogens only c. destruction of microbial spores only d. complete destruction or removal of all forms of life. e. killing of bacteria only

d. complete destruction or removal of all forms of life.

Bacteriostatic agents kill microorganisms.

false

Deinococcus radiodurans spores are extremely sensitive to radiation.

false

Dry heat sterilization is generally faster than moist heat sterilization.

false

Freezing is an effective way of killing all microorganisms within a food product and ensuring its sterility.

false

Penicillin is a broad spectrum antibiotic.

false

A sterile object is completely free of viable microorganisms.

true

Bacteria may develop antibiotic resistance by altering their biochemistry.

true

Ultraviolet radiation is normally used to sterilize air and exposed surfaces, but it cannot be used to sterilize interior compartments because it does not penetrate into those compartments.

true