Ch. 11 Questions

Question 1

A microbicidal agent has what effect?

a) sterilizes
b) inhibits microorganisms
c) is toxic to human cells
d) destroys microorganisms

Answer 1

d) destroys microorganisms

Question 2

Microbial control methods that kill _______ are able to sterilize.

a) viruses
b) the tubercle bacillus
c) endospores
d) cysts

Answer 2

c) endospores

Question 3

Any process that destroys the non-spore-forming contaminants on inanimate objects is

a) antisepsis
b) disinfection
c) sterilization
d) degermation

Answer 3

b) disinfection

Question 4

Sanitization is a process by which

a) the microbial load on objects is reduced
b) objects are made sterile with chemicals
c) utensils are scrubbed
d) skin is debrided

Answer 4

a) the microbial load on objects is reduced

Question 5

An example of an agent that lowers the surface tension of cells is

a) phenol
b) chlorine
c) alcohol
d) formalin

Answer 5

c) alcohol

Question 6

High temperatures _______ and low temperatures _______ .

a) sterilize, disinfect
b) kill cells, inhibit cell growth
c) denature proteins, burst cells
d) speed up metabolism, slow down metabolism

Answer 6

b) kill cells, inhibit cell growth

Question 7

The primary action of _______ heat is to _______ .

a) dry, destroy cell walls
b) moist, kill vegetative cells
c) dry, dissolve lipids
d) moist, denature proteins

Answer 7

d) moist, denature proteins

Question 8

The standard temperature-pressure combination for an autoclave is

a) 100°C and 4 psi
b) 121°C and 15 psi
c) 131°C and 9 psi
d) 115°C and 3 psi

Answer 8

b) 121°C and 15 psi

Question 9

Microbe(s) that is/are the target(s) of pasteurization include(s)

a) Clostridium botulinum
b) Mycobacterium species
c) Salmonella species
d) both b and c

Answer 9

d) both b and c

Question 10

Ionizing radiation like _______ removes _______ from atoms.

a) UV, protons
b) X-rays, the charge
c) gamma rays, electrons
d) cathode rays, ions

Answer 10

c) gamma rays, electrons

Question 11

The primary mode of action of nonionizing radiation is to

a) produce superoxide ions
b) make pyrimidine dimers
c) denature proteins
d) break disulfide bonds

Answer 11

b) make pyrimidine dimers

Question 12

The most versatile method of sterilizing heat-sensitive liquids is

a) UV radiation
b) exposure to ozone
c) beta propiolactone
d) filtration

Answer 12

d) filtration

Question 13

_______ is the iodine antiseptic of choice for wound treatment.

a) 8% tincture
b) 5% aqueous
c) 5% Iodophor
d) 7.5% potassium iodide solution

Answer 13

c) 5% Iodophor

Question 14

A chemical with sporicidal properties is

a) phenol
b) alcohol
c) quaternary ammonium compound
d) glutaraldehyde

Answer 14

d) glutaraldehyde

Question 15

Silver sulfadiazine is used

a) in antisepsis of burns
b) as a mouthwash
c) to treat genital gonorrhea
d) to disinfect water

Answer 15

a) in antisepsis of burns

Question 16

Detergents are

a) high-level germicides
b) surfactants
c) excellent antiseptics
d) used in disinfecting surgical instruments

Answer 16

b) surfactants

Question 17

Which of the following is an approved sterilant?

a) chlorhexidine
b) betadyne
c) ethylene oxide
d) ethyl alcohol

Answer 17

c) ethylene oxide

Question 18

What type of molecule can be denatured by heat or changes in pH?

a) carbohydrate
b) lipid
c) protein
d) simple sugar

Answer 18

c) protein

Question 19

Which molecule is composed of long chains of nucleic acids?

a) protein
b) lipid
c) DNA
d) carbohydrate

Answer 19

c) DNA