Mid-Term (Quiz)

Question 1

Which of the following is not a physical method for controlling microbial growth?

Answer 1

Zinc

Question 2

Heating liquids to above boiling temperature

Answer 2

Autoclaving

Question 3

Heating liquids to below boiling temperature

Answer 3

Pasteurization

Question 4

Burning organics to ashes

Answer 4

Incineration

Question 5

Inhibits growth of bacteria

Answer 5

Biostatic

Question 6

Kills bacteria

Answer 6

Biocide

Question 7

Bacterial contamination

Answer 7

Sepsis

Question 8

Removing most microbes from inert surfaces is called ______ ,

Answer 8

disinfection

Question 9

while removing most microbes from living tissues is called ___antisepsis___.

Answer 9

antisepsis

Question 10

Hydrogen peroxide is a biostatic method for controlling microbial growth.

Answer 10

False

Question 11

Which of the following chemicals is least effective against Non-enveloped viruses?

Answer 11

Alcohol

Question 12

Place the following microbes in order from most resistant to least resistant to antimicrobial chemicals.

____ Endospores
____ Non-enveloped viruses
____ Enveloped viruses
____ Gram-positive bacteria
____ Gram-negative bacteria
____ Mycobacteria

Answer 12

__1__
__4__
__6__
__5__
__3__
__2__

Question 13

Salts and sugars work to preserve foods by creating a(n) _________.

Answer 13

Hypertonic environment

Question 14

Which of the following physical control methods are biocidal?

Answer 14

Ionizing radiation

Question 15

Which of the following conditions will increase the effectiveness of chemical disinfectants?

Answer 15

Long exposure time

Question 16

The process of using chlorine bleach to kill most microbes on a toilet is best described as ___________.

Answer 16

Disinfection

Question 17

What is the major function of catalase?

Answer 17

Neutralize peroxide radicals

Question 18

Boiling water is an effective method for killing endospores.

Answer 18

False

Question 19

Removing or destroying all microorganisms is referred to as ______ .

Answer 19

Sterilization

Question 20

Which of the following ethanol concentrations is most effective at inhibiting microbial growth?

Answer 20

90% ethanol

Question 21

An atom or molecule with an unpaired electron is referred to as a(n) ______ .

Answer 21

Radical

Question 22

Which of the following disinfectants do not act by damaging cell membranes?

Answer 22

Glutaraldehyde

Question 23

List 2 major cellular structures affected by antimicrobial agents.

Answer 23

1. Cell Membrane
2. Nucleic Acids

Question 24

(a) 2 physical methods for controlling microbial growth that cause sterilization, and

Answer 24

A) Autoclaving, Dry heat Sterilization

Question 25

(b) 2 chemical methods for controlling microbial growth that cause sterilization.

Answer 25

B) Halogen, Alcohol