MCB 3020 EXAM 4 QUESTIONS AND ANSWERS
Which of the following can be examined with an ordinary bright-field microscope?
Wet mounts
Heat-fixed specimens
Chemical-fixed specimens
All of the choices are correct. - Answers - All of the choices are correct.
The most common method used by clinical microbiology labs for identifying bacteria are
_________. - Answers - biochemical
Which of the following tests can be used to distinguish Escherichia from Enterobacter? -
Answers - IMViC
Chlorination of water supplies represents an epidemiological technique directed at
________. - Answers - eliminating sources of infection
Standard microbiological practices include all of the following EXCEPT _________.
hair longer than shoulder length should be tied back
work space should be disinfected only when contaminating spills occur
eating, drinking, manipulation of contact lenses, and the use of cosmetics, gum, and
tobacco products are strictly prohibited in the lab
lab personnel should know how to use the emergency eyewash and shower stations -
Answers - work space should be disinfected only when contaminating spills occur
The most common types of healthcare-associated infections are _________. - Answers
- urinary tract infections
The ______ rate refers to the total number of individuals infected at any one time
regardless of when the disease began. - Answers - prevalence
_______ are the leading cause of healthcare-associated diseases. - Answers - Bacteria
The ______ rate is the relationship of the number of deaths from a given disease to the
total number of cases of the disease. - Answers - mortality
A(n) _______ is an increase in disease occurrence within a large population over a very
wide region (usually the world). - Answers - pandemic
Chlorination alone will usually suffice to inactivate viruses present in drinking water. T/F
- Answers - False
, Which of the following represents ways in which canned foods may undergo spoilage?
All of the choices are correct.
As a result of underprocessing during canning
Leakage of contaminated water through can seams during cooling
Spoilage before canning - Answers - All of the choices are correct.
Which of the following represents a different principle for food preservation? - Answers -
Heating
Penicillin is produced by some _________. - Answers - fungi
Indicator organisms are added to drinking water to test whether the purification process
is being carried out effectively. T/F - Answers - False
Potable water is unfit for consumption or recreation because of the high levels of
microbial contaminants present. T/F - Answers - False
Pasteurization of milk _________. - Answers - usually eliminates all disease-causing
organisms
All of the following are responsible for food safety EXCEPT _______. - Answers - There
are no exceptions here. All parties listed are responsible.
Water reuse is the purification of wastewater so that it can serve as drinking water. T/F -
Answers - True
What did Fredrick Griffith do? - Answers - Described bacterial transformation
What did Louis Pasteur do? - Answers - disproved spontaneous generation
What did Edward Jenner do? - Answers - discovered vaccine for smallpox
What did John Snow do? - Answers - Determined the source of a cholera outbreak
A microbe is discovered living in an extreme environment near a deep sea vent. The
microorganism lacks a nucleus and peptidoglycan in its cell wall, but it does have
unusual membrane lipids. This species is most likely a member of the Domain
_________ - Answers - Archaea
Which of the following experiments is used to identify new pathogens? - Answers - Koch
postulates
Which of the following can be examined with an ordinary bright-field microscope?
Wet mounts
Heat-fixed specimens
Chemical-fixed specimens
All of the choices are correct. - Answers - All of the choices are correct.
The most common method used by clinical microbiology labs for identifying bacteria are
_________. - Answers - biochemical
Which of the following tests can be used to distinguish Escherichia from Enterobacter? -
Answers - IMViC
Chlorination of water supplies represents an epidemiological technique directed at
________. - Answers - eliminating sources of infection
Standard microbiological practices include all of the following EXCEPT _________.
hair longer than shoulder length should be tied back
work space should be disinfected only when contaminating spills occur
eating, drinking, manipulation of contact lenses, and the use of cosmetics, gum, and
tobacco products are strictly prohibited in the lab
lab personnel should know how to use the emergency eyewash and shower stations -
Answers - work space should be disinfected only when contaminating spills occur
The most common types of healthcare-associated infections are _________. - Answers
- urinary tract infections
The ______ rate refers to the total number of individuals infected at any one time
regardless of when the disease began. - Answers - prevalence
_______ are the leading cause of healthcare-associated diseases. - Answers - Bacteria
The ______ rate is the relationship of the number of deaths from a given disease to the
total number of cases of the disease. - Answers - mortality
A(n) _______ is an increase in disease occurrence within a large population over a very
wide region (usually the world). - Answers - pandemic
Chlorination alone will usually suffice to inactivate viruses present in drinking water. T/F
- Answers - False
, Which of the following represents ways in which canned foods may undergo spoilage?
All of the choices are correct.
As a result of underprocessing during canning
Leakage of contaminated water through can seams during cooling
Spoilage before canning - Answers - All of the choices are correct.
Which of the following represents a different principle for food preservation? - Answers -
Heating
Penicillin is produced by some _________. - Answers - fungi
Indicator organisms are added to drinking water to test whether the purification process
is being carried out effectively. T/F - Answers - False
Potable water is unfit for consumption or recreation because of the high levels of
microbial contaminants present. T/F - Answers - False
Pasteurization of milk _________. - Answers - usually eliminates all disease-causing
organisms
All of the following are responsible for food safety EXCEPT _______. - Answers - There
are no exceptions here. All parties listed are responsible.
Water reuse is the purification of wastewater so that it can serve as drinking water. T/F -
Answers - True
What did Fredrick Griffith do? - Answers - Described bacterial transformation
What did Louis Pasteur do? - Answers - disproved spontaneous generation
What did Edward Jenner do? - Answers - discovered vaccine for smallpox
What did John Snow do? - Answers - Determined the source of a cholera outbreak
A microbe is discovered living in an extreme environment near a deep sea vent. The
microorganism lacks a nucleus and peptidoglycan in its cell wall, but it does have
unusual membrane lipids. This species is most likely a member of the Domain
_________ - Answers - Archaea
Which of the following experiments is used to identify new pathogens? - Answers - Koch
postulates
