Microbiology 020 - General Microbiology » Spring 2022 » Review Quiz 4

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Question #1
Which element is required in very small (trace) amounts and could be deadly when consumed in large amounts?
A.   nitrogen
B.   carbon
C.   hydrogen
D.   oxygen
E.   iron
Question #2
In what phase of bacterial growth are cells are growing the fastest?
A.   stationary
B.   lag
C.   log
D.   decline
Question #3
A bacterial cell with a generation time of 1 hour was inoculated into a culture medium. How many cells are there after 3 hours? Assume no death occurred and they are growing to their potential.
A.   2
B.   8
C.   4
D.   16
E.   32
Question #4
Which type of bacteria grows best in our body?
A.   thermophiles
B.   halophiles
C.   mesophiles
D.   psychrophiles
Question #5
Bacteria thriving at the bottom of stagnant water where there is extremely low concentration of oxygen gas tend to be __________________.
A.   obligate aerobes
B.   dead
C.   obligate anaerobes
D.   facultative anerobes
Question #6
_________________media have ingredients that are not precisely defined.
A.   Complex
B.   Differential
C.   Selective
D.   Enrichment
Question #7
Biofilms have the potential to destroy materials on surfaces where they form.
A.   True
B.   False
Question #8
A microbe that benefits from an association with a host but the host is unaffected by the presence of the microbe is the host's ________________.
A.   commensal
B.   parasite
C.   predator
D.   competitor
Question #9
Which solid culture medium has the smallest surface? Nutrient agar ___________.
A.   slant
B.   plate
C.   deep
Question #10
Bacterial cells divide by mitosis and cytokinesis.
A.   False
B.   True

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