BIO 203 EXAM 1 QUESTIONS &
ANSWERS 100% CORRECT
Approximately how many microbes inhabit our bodies? - ANSWERTrillions
Which of the follow best describes normal microbiota? - ANSWERmicrobes that are
associated with the body naturally
If you start with 3 bacterial cells how many would you have after 40 minutes if the
generation time is 10 minutes? (assume optimal conditions) - ANSWER30
Which of the following is not a barrier as described under Standard/Universal
Precautions? - ANSWERbodily fluids
Standard/Universal precautions were developed - ANSWERbecause most
healthcare settings were using a mixed combination of isolation precautions
Which of the following is not an appropriate time to wash your hands? - ANSWERa)
When you enter the classroom/lab
b) Before you leave the classroom/lab
c) After cleaning a biohazard spill
d) all of the above are when you should wash your hands
d) all of the above are when you should wash your hands
Which stage of a bacterial growth curve is the acclimation phase? - ANSWERlag
phase
Which stage of a bacterial growth curve does the number of dying cells equal the
number of cells reproducing phase? - ANSWERStationary phase
What instrument is used to measure microbial growth? -
ANSWERSpectrophotometry
Why is carbon an essential element for growth? - ANSWERit is the backbone
element of all macromolecules
Which of the follow best describes an opportunistic pathogen? - ANSWERmicrobes
that don't normally cause illness
Which of the follow best describes why opportunistic pathogens are opportunistic? -
ANSWERa) they enter into the body where they are not normally found
b) you are immunocompromised
, c) they mutate and cause disease
d) none of the above
e) a and b are correct
f) b and c are correct
g) a, b, and c are correct
e) a and b are correct
Which of the following best describes an emerging disease? - ANSWERa new
disease
Which of the following best describes a re-emerging disease? - ANSWERa disease
that was once controlled and now on the rise
these microbes are what are usually associated with the skin - ANSWERResident
Microbiota
These microbes are what are not usually associated with the skin but are picked up
through contact with objects or people - ANSWERTransient microbiota
Which of the following would be an example of an emerging disease? - ANSWERa)
measles
b) mumps
c) HIV/AIDS
d) pertussis
c) HIV/AIDS
Which of the following would be an example of an re-emerging disease? -
ANSWERa) MRSA
b) E. coli O157:H7
c) HIV/AIDS
d) pertussis
d) Pertussis
Why is decomposition significant? - ANSWERa) aids in sewage treatment
b) results in a loss of food
c) can result in the breakdown of toxins
d) all of the above
d) All of the Above
Which of the following was one of the significant events leading to the field of
microbiology? - ANSWERdebate over spontaneous generation
Fransceco Redi provided evidence for which theory? - ANSWERbiogenesis
John Needham provided evidence for which theory? - ANSWERspontaneous
generation
ANSWERS 100% CORRECT
Approximately how many microbes inhabit our bodies? - ANSWERTrillions
Which of the follow best describes normal microbiota? - ANSWERmicrobes that are
associated with the body naturally
If you start with 3 bacterial cells how many would you have after 40 minutes if the
generation time is 10 minutes? (assume optimal conditions) - ANSWER30
Which of the following is not a barrier as described under Standard/Universal
Precautions? - ANSWERbodily fluids
Standard/Universal precautions were developed - ANSWERbecause most
healthcare settings were using a mixed combination of isolation precautions
Which of the following is not an appropriate time to wash your hands? - ANSWERa)
When you enter the classroom/lab
b) Before you leave the classroom/lab
c) After cleaning a biohazard spill
d) all of the above are when you should wash your hands
d) all of the above are when you should wash your hands
Which stage of a bacterial growth curve is the acclimation phase? - ANSWERlag
phase
Which stage of a bacterial growth curve does the number of dying cells equal the
number of cells reproducing phase? - ANSWERStationary phase
What instrument is used to measure microbial growth? -
ANSWERSpectrophotometry
Why is carbon an essential element for growth? - ANSWERit is the backbone
element of all macromolecules
Which of the follow best describes an opportunistic pathogen? - ANSWERmicrobes
that don't normally cause illness
Which of the follow best describes why opportunistic pathogens are opportunistic? -
ANSWERa) they enter into the body where they are not normally found
b) you are immunocompromised
, c) they mutate and cause disease
d) none of the above
e) a and b are correct
f) b and c are correct
g) a, b, and c are correct
e) a and b are correct
Which of the following best describes an emerging disease? - ANSWERa new
disease
Which of the following best describes a re-emerging disease? - ANSWERa disease
that was once controlled and now on the rise
these microbes are what are usually associated with the skin - ANSWERResident
Microbiota
These microbes are what are not usually associated with the skin but are picked up
through contact with objects or people - ANSWERTransient microbiota
Which of the following would be an example of an emerging disease? - ANSWERa)
measles
b) mumps
c) HIV/AIDS
d) pertussis
c) HIV/AIDS
Which of the following would be an example of an re-emerging disease? -
ANSWERa) MRSA
b) E. coli O157:H7
c) HIV/AIDS
d) pertussis
d) Pertussis
Why is decomposition significant? - ANSWERa) aids in sewage treatment
b) results in a loss of food
c) can result in the breakdown of toxins
d) all of the above
d) All of the Above
Which of the following was one of the significant events leading to the field of
microbiology? - ANSWERdebate over spontaneous generation
Fransceco Redi provided evidence for which theory? - ANSWERbiogenesis
John Needham provided evidence for which theory? - ANSWERspontaneous
generation
