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Chapter 8 Microbiology

56 Questions  I  By Andreazza
Chapter 8 Microbiology
Chapter 8 Microbiology  

  
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1.  Which of the following inhibits bacterial growth but does not kill bacteria  
A.
B.
C.
D.
2.  When antiseptics and disinfectants are compared, antiseptics are generally  
A.
B.
C.
D.
3.  An agent that specifically kills fungi but not other kinds of microorganisms is also known as a  
A.
B.
C.
D.
4.  Sterilization involves __________ all viable microorganisms.  
A.
B.
C.
D.
5.  All germicides are capable of killing all pathogenic organisms and endospores.  
A.
B.
6.  An agent that kills bacteria is referred to as __________.  
7.  An agent that prevents the growth of bacteria without causing irreversible damage to the bacteria is referred to as __________.  
8.  The destruction or removal of all viable organisms is called  
A.
B.
C.
D.
9.  The reduction of the microbial population to levels that are considered safe by public health standards is called  
A.
B.
C.
D.
10.  The prevention of infection caused by microorganisms is called  
A.
B.
C.
D.
11.  The substantial reduction of the total population of microorganisms on inanimate objects and the destruction of potential pathogens is called  
A.
B.
C.
D.
12.  A(n) __________ is a chemical that can be used to sterilize materials.  
A.
B.
C.
D.
13.  Which of the following represents the best definition for microbial death?  
A.
B.
C.
D.
14.  The time required to kill 90% of the microorganisms or spores in a sample at a specified temperature is the  
A.
B.
C.
D.
15.  The rate of killing by an antimicrobial agent may slow when the microbial population has been greatly reduced because the remaining population may have a high proportion of resistant organisms.  
A.
B.
16.  Which of the following influence(s) the efficiency of an antimicrobial agent?  
A.
B.
C.
D.
17.  Larger populations generally are killed as rapidly as smaller populations.  
A.
B.
18.  Which will require a longer time to kill?  
A.
B.
C.
D.
19.  Microorganisms show differential sensitivity to antimicrobial agents.  
A.
B.
20.  Which of the following environmental factors generally do(es) not have an impact on the efficiency of an antimicrobial agent?  
A.
B.
C.
D.
21.  Which of the following is not a method of heat sterilization?    
A.
B.
C.
D.
22.  Which of the following is MOST effective against resistant endospores?  
A.
B.
C.
D.
23.  Which of the following lacks sufficient penetrating power for bulk sterilization?  
A.
B.
C.
D.
24.  Moist heat sterilization at 100C kills all of the following except  
A.
B.
C.
D.
25.  Gamma radiation  
A.
B.
C.
D.
26.  Moist heat sterilizes by  
A.
B.
C.
D.
27.  Which of the following is true about membrane filters?  
A.
B.
C.
D.
28.  When comparing dry heat and moist heat sterilization, dry heat is  
A.
B.
C.
D.
29.  The first product to be commercially treated by pasteurization was  
A.
B.
C.
D.
30.  Pasteurization is used to  
A.
B.
C.
D.
31.  Which kind of sterilization procedure takes advantage of the size of microorganisms?  
A.
B.
C.
D.
32.  Ultraviolet radiation is an effective means of sterilizing surfaces.  
A.
B.
33.  If one left a "Pasteurized" flask of broth for a long time at room temperature, it would stay sterile forever, at least in principle.  
A.
B.
34.  The type of filter used in a laminar flow biological safety cabinet is called a(n) __________ filter.  
35.  Dry heat methods usually require lower temperatures and shorter exposure times than moist heat methods to achieve the same degree of killing because of the drying effects of this form of heat.  
A.
B.
36.  Because filtration removes rather than destroys microorganisms, it does not truly sterilize the materials passing through the filter.  
A.
B.
37.  Which of the following is a function of pasteurization?  
A.
B.
C.
D.
38.  Which of these is an agent that is used to sterilize the plastic tubing of heart-lung machines?  
A.
B.
C.
D.
39.  Joseph Lister  
A.
B.
C.
D.
40.  Heavy metals may inactivate proteins by reacting with their sulfhydryl groups.  
A.
B.
41.  Alcohols are widely used as antiseptics and disinfectants because they are effective against endospores as well as vegetative cells.  
A.
B.
42.  Betapropiolactone is not as useful as ethylene oxide as a sterilizing agent because it does not penetrate materials as readily as ethylene oxide.  
A.
B.
43.  Heavy metals are effective antimicrobial agents but are not widely used because of their high toxicity to humans.  
A.
B.
44.  The disinfectant action of phenol and phenolic derivatives mainly is due to  
A.
B.
C.
D.
E.
45.  The disinfecting properties of Lysol, a common household disinfectant, depend upon the presence of __________.  
46.  Which of the following is (are) a sterilizing gas(es) that can be used on heat-sensitive materials?  
A.
B.
C.
D.
47.  Amphipathic organic molecules that serve as disinfectants by disrupting membranes and denaturing proteins are called  
A.
B.
C.
D.
48.  The disinfectant of choice for municipal water supplies is __________.  
A.
B.
C.
D.
49.  Iodine can be complexed with an organic carrier to form water-soluble, stable complexes called __________, which release iodine slowly and eliminate skin burns and irritation associated with iodine use.  
A.
B.
C.
D.
50.  Although heavy metals are no longer widely used as germicides, __________ is an effective algicide in lakes and swimming pools.  
A.
B.
C.
D.
51.  The two most important alcohol germicides are __________ and __________.  
A.
B.
C.
D.
52.  Disinfectants are generally regulated by the  
A.
B.
C.
D.
53.  Antiseptics are generally regulated by the  
A.
B.
C.
D.
54.  The disinfectant screening method that is known as the ________ _________ test, which is used to measure the potency of a disinfectant. (2 words)  
55.  The higher the phenol coefficient value, the _______ effective the disinfectant under the test conditions.  
56.  Bacteriophage therapy was developed after antibiotics were first discovered and used for treating bacterial infections.  
A.
B.
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