Brock Biology of Microorganisms Chapter 5 | Study Guide & Practice Questions

Brock
Brock
Biology
10/6/2026,
Biology
of Microorganisms
of
4:05:22
Microorganisms
AMBrock
Chapter
Biology
Chapter
5.pdf)(#UUNDS*(HN
of5.pdf)(#UUNDS*(HN
Microorganisms Chapter
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
5.pdf)(#UUNDS*(HN (*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
Biology
Biology
of Microorganisms
of Microorganisms
Chapter
Biology
Chapter
5.pdf
of5.pdf
Microorga




Brock Biology of Microorganisms Chapter
5
D- ✅ -Which of the following is/are transferred to daughter cells during cell
division?
a. Genomic DNA, the blueprint for everything the cell needs
b. Individual genes and enzymes to later be brought together to form the genome
c. Chromosome and enzymes to immediately begin cellular metabolism
d. Chromosome, proteins, and all other cellular constituents

A-  -2. Which is most abundant and active in divisome complexes?
a. FtsZ
b. DNA replication forks
c. MinCD
d. MreB

B-  -3. The process by which two cells arise from one is known as
a. Conjugation
b. Binary fission
c. Meiosis
d. Mitosis

B-  -4. A bacterium that lacks the MreB gene will have a ____ shape
a. Bacillus
b. Coccoid
c. Short bacillus
d. Vibrio

A-  -5. The time interval required for the formation of two cells from one is
called the
a. Generation time
b. Growth time
c. Growth rate
d. Division rate

D-  -6. Enumerating cells in a biofilm is especially challenging for
a. Microscopic direct counting
b. Measuring turbidity
c. Viability counts with spread plating
d. Microscopic direct county, measuring turbidity, and viability counts with spread
plating

A-  -7. The time between inoculation and the beginning of growth is usually
called the
a. Lag phase
b. Log phase
c. Dormant phase
d. Death phase




Brock
Brock
Biology
Brock
Biology
Biology
of Microorganisms
of Microorganisms
of Microorganisms
Chapter
Chapter
Chapter
5.pdf)(#UUNDS*(HN
5.pdf)(#UUNDS*(HN
5.pdf)(#UUNDS*(HN
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
Biology
Biology
Biology
of Microorganisms
of Microorganisms
of Microorganisms
Chapter
Chapter
Chapter
5.pdf
5.pdf
5.pdf

, Brock
Brock
Biology
10/6/2026,
Biology
of Microorganisms
of
4:05:22
Microorganisms
AMBrock
Chapter
Biology
Chapter
5.pdf)(#UUNDS*(HN
of5.pdf)(#UUNDS*(HN
Microorganisms Chapter
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
5.pdf)(#UUNDS*(HN (*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
Biology
Biology
of Microorganisms
of Microorganisms
Chapter
Biology
Chapter
5.pdf
of5.pdf
Microorga




D- ✅ -8. Optical density and viable cell concentration are LEAST proportional
to each other during
a. Lag phase
b. Exponential growth phase
c. Stationary phase
d. Death phase

B-  -9. To determine viable cell counts of a heat-sensitive bacterial isolate,
which cell counting method would be best to avoid?
a. Spread-plate method
b. Pour-plate method
c. Live staining and direct counting with a microscope
d. Both spread- and pour-plate methods

B-  -10. Bacteria that are able to grow in humans and cause disease have
likely evolved to be
a. Psychrophiles
b. Mesophiles
c. Theromphiles
d. Hyperthermophiles

C-  -11. Where would it be best to isolate bacteria from to study the
mechanism of the sodium motive force?
a. Human gut
b. Hot springs
c. Soda lakes
d. Volcanoes

C-  -12. An agar plate for counting colonies and maximizing statistical
validity should ideally contain
a. 1 to 100 colonies
b. 50 to 100 colonies
c. 30 to 300 colonies
d. 100 to 1000 colonies

B-  -14. The number of colonies obtained in a plate count does not depend
on the
a. Inoculum volume
b. Size of the colonies
c. Type of culture medium
d. Incubation time

A-  -15. Cell density in a chemostat is controlled by
a. The concentration of the limiting nutrient
b. The dilution factor
c. The size of the initial inoculum
d. The concentration of the limiting nutrient, the dilution factor, and the size of the
initial inoculum

C- -16. In which type of culture(s) does one find a closed system?

Brock
Brock
Biology
Brock
Biology
Biology
of Microorganisms
of Microorganisms
of Microorganisms
Chapter
Chapter
Chapter
5.pdf)(#UUNDS*(HN
5.pdf)(#UUNDS*(HN
5.pdf)(#UUNDS*(HN
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
(*OIUJE(**&EHUH(*&OIUEH*&E*&YE(E*E*(*EII&UBrock
Biology
Biology
Biology
of Microorganisms
of Microorganisms
of Microorganisms
Chapter
Chapter
Chapter
5.pdf
5.pdf
5.pdf