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.   oxygen
B.   nitrogen
C.   iron
D.   carbon
E.   hydrogen
Question #2
In what phase of bacterial growth are cells are growing the fastest?
A.   decline
B.   log
C.   lag
D.   stationary
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.   4
B.   8
C.   32
D.   16
E.   2
Question #4
Which type of bacteria grows best in our body?
A.   halophiles
B.   psychrophiles
C.   thermophiles
D.   mesophiles
Question #5
Bacteria thriving at the bottom of stagnant water where there is extremely low concentration of oxygen gas tend to be __________________.
A.   dead
B.   obligate aerobes
C.   facultative anerobes
D.   obligate anaerobes
Question #6
_________________media have ingredients that are not precisely defined.
A.   Enrichment
B.   Selective
C.   Complex
D.   Differential
Question #7
Biofilms have the potential to destroy materials on surfaces where they form.
A.   False
B.   True
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.   parasite
B.   commensal
C.   predator
D.   competitor
Question #9
Which solid culture medium has the smallest surface? Nutrient agar ___________.
A.   slant
B.   deep
C.   plate
Question #10
Bacterial cells divide by mitosis and cytokinesis.
A.   True
B.   False

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