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.   iron
C.   oxygen
D.   hydrogen
E.   carbon
Question #2
In what phase of bacterial growth are cells are growing the fastest?
A.   log
B.   stationary
C.   lag
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.   4
B.   8
C.   2
D.   32
E.   16
Question #4
Which type of bacteria grows best in our body?
A.   psychrophiles
B.   halophiles
C.   mesophiles
D.   thermophiles
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.   facultative anerobes
C.   obligate anaerobes
D.   obligate aerobes
Question #6
_________________media have ingredients that are not precisely defined.
A.   Enrichment
B.   Complex
C.   Selective
D.   Differential
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.   predator
B.   competitor
C.   parasite
D.   commensal
Question #9
Which solid culture medium has the smallest surface? Nutrient agar ___________.
A.   plate
B.   slant
C.   deep
Question #10
Bacterial cells divide by mitosis and cytokinesis.
A.   False
B.   True

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