TEST BANK FOR OPEXSTAX MICROBIOLOGY
QUESTIONS AND SOLUTIONS.ALL CHAPTERS
INCLUDED
Chapter 1: An Invisible World
* = Correct answer
Multiple Choice
1. Yeasts are which of the following?
A.a type of algae
B.a type of protist
C.any unicellular microbe
D.unicellular fungi*
Difficulty: Moderate ASM
Standard: 20
3.The cell walls of archaeans often contain which of the following substances?
A.cellulose
B.chitin
C.peptidoglycan
D.pseudopeptidoglycan*
ASM Standard: 20
4.Which of the following is not true of archaeans? A. Some species live on the human body.
B.They are genetically distinct from bacteria.
C.They are only found in extreme environments.*
D.They have substantial metabolic differences from bacteria.
Difficulty: Difficult ASM
Standard: 20
Page 1 of 17
,Which of the following is not true about the process
offermentation? A. It can help preserve foods,
preventingspoilage.
B. It converts sugars to organic acids, alcohols, and/or gases such as carbon dioxide.
C. It is carried out exclusively by unicellular eu𝑘aryotes such as
yeast.*D. It is used to ma𝑘e foods such as cheese and bread.
Difficulty: Moderate
ASM Standard: 11, 23, 26
5.The Romans may have reduced their ris𝑘 of waterborne infectious diseases by using which
of the following?
A.a variety of pharmaceutical products
B.aqueducts and a sewer system*
C.prophylactic antibiotics
D.quarantine of people with leprosy
Difficulty: Moderate
ASM Standard: 23
6.For which of the following is Thucydides 𝑘nown?
A.developing an effective sewer system in ancient Greece, helping to reduce levels
ofdisease in cities
B.observing microbes, using a microscope, for the first time, even distinguishing
betweenbacteria and fungi
C.proposing that disease was caused by microorganisms
D.realizing that people who had been infected by the Athenian plague had immunity
toreinfection*
Difficulty: Moderate
ASM Standard: 23, 31
7.Ernst Haec𝑘el proposed a classification system consisting of which of the
followingsubgroups? A. five 𝑘ingdoms
B.four 𝑘ingdoms*
C.two domains and three 𝑘ingdoms
D.two domains and five 𝑘ingdoms
Difficulty: Moderate ASM
Standard: N/A
Page 2 of 17
,8.Viruses not included in phylogenetic trees for which of the following reasons? A. It is too
difficult to observe their characteristics.
B.They are acellular and nonliving.*
C.They do not have any genes, which prevents genetic
analysis.D.They lac𝑘 a nucleus.
Difficulty: Moderate ASM
Standard: 5
9.Which is the best description of the primary purpose of a phylogeny? A. Phylogenies show
all the alterative names for each species.
B.Phylogenies show all the common names for each species.
C.Phylogenies show evolutionary relatedness between
organisms.*D.Phylogenies show interactions between species in a
shared habitat.
Difficulty: Moderate ASM
Standard: 5
10.Current phylogenetic analyses include which of the following?
A.information from a range of sources, including morphological, genetic, and
biochemicaldata*
B.information on visible similarities only
C.information regarding how to classify organisms on the basis of external
morphologicalcharacteristics and visible behaviors
D.varied morphological and structural characteristics, with preference for leaving
historicalclassifications to prevent confusion
Difficulty: Moderate ASM
Standard: 5
11.Diatoms are classified within which of the following domains?
A.Archaea
B.Bacteria
C.Eu𝑘arya*
D.Pro𝑘aryota
Difficulty: Moderate ASM
Standard: N/A
12.Horizontal gene transfer involves which of the following?
A.any transfer of genes in a laboratory setting
, Page 3 of 17
QUESTIONS AND SOLUTIONS.ALL CHAPTERS
INCLUDED
Chapter 1: An Invisible World
* = Correct answer
Multiple Choice
1. Yeasts are which of the following?
A.a type of algae
B.a type of protist
C.any unicellular microbe
D.unicellular fungi*
Difficulty: Moderate ASM
Standard: 20
3.The cell walls of archaeans often contain which of the following substances?
A.cellulose
B.chitin
C.peptidoglycan
D.pseudopeptidoglycan*
ASM Standard: 20
4.Which of the following is not true of archaeans? A. Some species live on the human body.
B.They are genetically distinct from bacteria.
C.They are only found in extreme environments.*
D.They have substantial metabolic differences from bacteria.
Difficulty: Difficult ASM
Standard: 20
Page 1 of 17
,Which of the following is not true about the process
offermentation? A. It can help preserve foods,
preventingspoilage.
B. It converts sugars to organic acids, alcohols, and/or gases such as carbon dioxide.
C. It is carried out exclusively by unicellular eu𝑘aryotes such as
yeast.*D. It is used to ma𝑘e foods such as cheese and bread.
Difficulty: Moderate
ASM Standard: 11, 23, 26
5.The Romans may have reduced their ris𝑘 of waterborne infectious diseases by using which
of the following?
A.a variety of pharmaceutical products
B.aqueducts and a sewer system*
C.prophylactic antibiotics
D.quarantine of people with leprosy
Difficulty: Moderate
ASM Standard: 23
6.For which of the following is Thucydides 𝑘nown?
A.developing an effective sewer system in ancient Greece, helping to reduce levels
ofdisease in cities
B.observing microbes, using a microscope, for the first time, even distinguishing
betweenbacteria and fungi
C.proposing that disease was caused by microorganisms
D.realizing that people who had been infected by the Athenian plague had immunity
toreinfection*
Difficulty: Moderate
ASM Standard: 23, 31
7.Ernst Haec𝑘el proposed a classification system consisting of which of the
followingsubgroups? A. five 𝑘ingdoms
B.four 𝑘ingdoms*
C.two domains and three 𝑘ingdoms
D.two domains and five 𝑘ingdoms
Difficulty: Moderate ASM
Standard: N/A
Page 2 of 17
,8.Viruses not included in phylogenetic trees for which of the following reasons? A. It is too
difficult to observe their characteristics.
B.They are acellular and nonliving.*
C.They do not have any genes, which prevents genetic
analysis.D.They lac𝑘 a nucleus.
Difficulty: Moderate ASM
Standard: 5
9.Which is the best description of the primary purpose of a phylogeny? A. Phylogenies show
all the alterative names for each species.
B.Phylogenies show all the common names for each species.
C.Phylogenies show evolutionary relatedness between
organisms.*D.Phylogenies show interactions between species in a
shared habitat.
Difficulty: Moderate ASM
Standard: 5
10.Current phylogenetic analyses include which of the following?
A.information from a range of sources, including morphological, genetic, and
biochemicaldata*
B.information on visible similarities only
C.information regarding how to classify organisms on the basis of external
morphologicalcharacteristics and visible behaviors
D.varied morphological and structural characteristics, with preference for leaving
historicalclassifications to prevent confusion
Difficulty: Moderate ASM
Standard: 5
11.Diatoms are classified within which of the following domains?
A.Archaea
B.Bacteria
C.Eu𝑘arya*
D.Pro𝑘aryota
Difficulty: Moderate ASM
Standard: N/A
12.Horizontal gene transfer involves which of the following?
A.any transfer of genes in a laboratory setting
, Page 3 of 17
