Chapter 8 Microbiology Quiz
Microbiology gives the learner a chance to study the biology of bacteria, viruses, protozoa and fungi. If one has a good understanding on this topic they will be able to have answers to some scientific questions on diseases. Do you believe you got a proper understanding of Chapter 8 on Microbiology? Take up the quiz below.
- 1.Which of the following inhibits bacterial growth but does not kill bacteria
- A.
Lysozyme
- B.
Bactericidal agent
- C.
Bacteriostatic agent
- D.
Antiseptic agent
- 2.When antiseptics and disinfectants are compared, antiseptics are generally
- A.
Less toxic
- B.
More toxic
- C.
Equally as toxic
- D.
Unpredictable in toxicity
- 3.An agent that specifically kills fungi but not other kinds of microorganisms is also known as a
- A.
Fungistatic agent
- B.
Mycostatic agent
- C.
Fungicidal agent
- D.
Germicidal agent
- 4.Sterilization involves __________ all viable microorganisms.
- A.
Killing
- B.
Removing
- C.
Killing OR removing
- D.
Metabolically inactivating
- 5.All germicides are capable of killing all pathogenic organisms and endospores.
- A.
True
- B.
False
- 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.
Disinfection
- B.
Antisepsis
- C.
Sterilization
- D.
Sanitization
- 9.The reduction of the microbial population to levels that are considered safe by public health standards is called
- A.
Disinfection
- B.
Antisepsis
- C.
Sterilization
- D.
Sanitization
- 10.The prevention of infection caused by microorganisms is called
- A.
Disinfection
- B.
Antisepsis
- C.
Sterilization
- D.
Sanitization
- 11.The substantial reduction of the total population of microorganisms on inanimate objects and the destruction of potential pathogens is called
- A.
Disinfection
- B.
Antisepsis
- C.
Sterilization
- D.
Sanitization
- 12.A(n) __________ is a chemical that can be used to sterilize materials.
- A.
Oxidant
- B.
Disinfectant
- C.
Antiseptic
- D.
Sterilant
- 13.Which of the following represents the best definition for microbial death?
- A.
The organism will not grow on minimal medium.
- B.
The organism will not grow on a medium that normally supports its growth.
- C.
The organism no longer retains its original shape and structures.
- D.
None of these adequately describe microbial death.
- 14.The time required to kill 90% of the microorganisms or spores in a sample at a specified temperature is the
- A.
Thermal death time (TDT).
- B.
Thermal death point (TDP).
- C.
Decimal reduction time (D value).
- D.
Z value
- 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.
True
- B.
False
- 16.Which of the following influence(s) the efficiency of an antimicrobial agent?
- A.
Concentration of the agent
- B.
Duration of exposure
- C.
Temperature
- D.
All of the above
- 17.Larger populations generally are killed as rapidly as smaller populations.
- A.
True
- B.
False
- 18.Which will require a longer time to kill?
- A.
A larger population of microorganisms
- B.
A smaller population of microorganisms
- C.
Killing will be equally as rapid in a large or a small microbial population.
- D.
There is no way to predict which will require a longer kill time.
- 19.Microorganisms show differential sensitivity to antimicrobial agents.
- A.
True
- B.
False
- 20.Which of the following environmental factors generally do(es) not have an impact on the efficiency of an antimicrobial agent?
- A.
PH
- B.
Presence or absence of a biofilm
- C.
Concentration of organic matter
- D.
Refractive index
- 21.Which of the following is not a method of heat sterilization?
- A.
Autoclaving
- B.
Boiling
- C.
Pasteurization
- D.
All of these are equally effective against resistant endospores.
- 22.Which of the following is MOST effective against resistant endospores?
- A.
Autoclaving
- B.
Boiling
- C.
Pasteurization
- D.
All of these are equally effective against resistant endospores
- 23.Which of the following lacks sufficient penetrating power for bulk sterilization?
- A.
Ultraviolet (UV) radiation at 260 nm
- B.
X rays
- C.
Gamma radiation
- D.
Alpha and beta particles
- 24.Moist heat sterilization at 100C kills all of the following except
- A.
Bacterial endospores.
- B.
Fungal spores
- C.
Viruses
- D.
Bacterial endospores and fungal spores
- 25.Gamma radiation
- A.
Is a type of nonionizing radiation.
- B.
Has poor penetrating power.
- C.
Is used to sterilize some food products.
- D.
Has a longer wavelength than UV radiation.
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