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Intro to micro control of microorganisms LU 3

Total questions: 17

Worksheet time: 13mins

Name
Class
Date
1.

These are ammonium salts, chemical disinfectants and antiseptics that act by disrupting biological membranes and possibly by denaturing proteins.

a)

Phenolic compounds

b)

Aldehydes

c)

 Alcohols

d)

Quaternary Ammonium compounds

e)

Halogens

2.

This is a concentrated form of formaldehyde that is used in the mortuary

a)

glutaraldehyde

b)

formalin

c)

formaldehyde

d)

phenol

3.

Match the following

a)

Quats

1.

Formula 409

b)

phenolic compunds

2.

hexachlorophene

c)

alcohol

3.

Isopropanol

d)

halogens

4.

iodophors

e)

aldehydes

5.

glutaraldehyde

4.

What is a substance that destroys microorganisms; is a chemical agent that will kill various microorganisms, but not necessarily their spores referred to as?

a)

germicide

b)

bactericide

c)

virucide

d)

 fungicide

e)

larvicide

5.

When an object is free of all forms of life including bacterial endospores and viruses, it is said to be?

a)

sterile

b)

clean

c)

bacteriostatic

d)

disinfected

6.

Cresols are phenolic compounds that are derived from a chemical known as toluene.

a)

true

b)

false

7.

This is a form of non-ionizing radiation that can effectively control the growth of microorganisms by damaging its DNA, its genetic material

a)

sunlight

b)

ultaviolet light

c)

daylight

d)

x-rays

8.

Ethyl alcohol is the most widely used alchol and is normally used at a concetration between 60 and 95%.

a)

true

b)

false

9.

Organize these options into the right categories

Categorize the following

scrubbing

filtration

halogens

alcohols

boiling

incineration

phenols

ultraviolter light

fungicide

autoclave

Physical method
chemical method
temperature
10.

What is an agent that prevents or inhibits growth of microbes, but is safe to use on human tissues is called?

a)

alcoholic agent

b)

incineration agent

c)

sterilization agent

d)

antiseptic agent

11.

What is the process of completely removing or destroying all life forms, and their products including endospores referred to as?    

a)

disinfection

b)

sanitation

c)

sterilization

d)

filtration

12.

What is the process by which microbial growth is inhibited on living tissue to prevent infection called?

a)

bacteriostasis

b)

disinfection

c)

sterilization

d)

sanitation

13.

What group of disinfectants includes chlorine, bleach, and iodine, and work by oxidizing the components of the microbial cells.  

a)

Alcohols

b)

Halogens

c)

Phenols

d)

Aldehydes

e)

Germicides

14.

What is an agent that destroys bacteria but not necessarily their spores called?

a)

bactericide

b)

virucide

c)

germicide

d)

 insecticides

e)

larvicides

15.

This method of microbial growth does not inactivate spores, but does kill most vegetative microorganisms

a)

incineration

b)

disinfection

c)

sterilization

d)

scrubbing

16.

​ (a)   ​ is more effective against bacteria​ and ​ (b)   is more effective against viruses.

Choose from the below words

isopropanol

ethanol

17.

What are chemical agents that kill the larval which are wormlike forms of newly hatched insects referred to as?

a)

fungicide

b)

larvicides

c)

fungicide

d)

 virucide

e)

germicide