Chapter 8 Microbiology Quiz

56 Questions | By Andreazza | Updated: Mar 21, 2022 | Attempts: 371

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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.

Questions and Answers

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.