, TESTBANK for Microbiology 3e Wessner
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,Package Title: Test Bank
Course Title: Wessner 3e
Chapter Number: 1 The Microbial World
Question Type: Multiple Choice
1) Which of these is considered to be the smallest unit of life?
a) A nucleus
b) A mitochondrion
c) A plasmid
d) A cell
e) A prion
Answer: d
Difficulty: Easy
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
2) The study of microbiology includes all of the following EXCEPT ________.
a) plants
b) viruses
c) bacteria
d) fungi
e) algae
Answer: a
Difficulty: Easy
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
3) What percent of the dry weight of the cell is composed of DNA?
a) 2–5
b) 12–15
c) 25–30
d) 35–40
,e) 50–55
Answer: a
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
4) What are the three domains of life?
a) Monera, Animals, and Plants
b) Bacteria, Archaea, and Eukarya
c) Prokaryote, Eukaryote, and Fungi
d) Animals, Plants, and Bacteria
e) Prokaryote, Eukaryote, and Archaea
Answer: b
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
5) Which of the characteristics of life is NOT displayed by any individual organism?
a) Metabolism
b) Growth
c) Reproduction
d) Evolution
e) Response
f) Homeostasis
Answer: d
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
6) Viruses are considered "nonliving" for all of the following reasons EXCEPT that they
a) need a host cell for replication.
b) are metabolically inert.
,c) possess a genome that can change over time.
d) do not maintain internal homeostasis.
e) are not responsive to environmental changes.
Answer: c
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
7) Which is a macromolecular difference between the domains Bacteria and Archaea?
a) Archaea contain a nucleus, but Bacteria do not.
b) Bacteria contain DNA, but Archaea do not.
c) Bacteria contain a plasma membrane, but Archaea do not.
d) Bacteria cell wall contains peptidoglycan, but the Archaea cell wall does not.
e) Archaea contain multiple types of RNA polymerase, but Bacteria has only one type.
Answer: d
Difficulty: Hard
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
8) The size and shapes of archaeal cells suggest relatedness to
a) bacteria.
b) prokaryotes.
c) eukarya.
d) all other life forms.
e) no other life forms; their sizes and shapes are unique.
Answer: a
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
9) Why is the term microbes more general than the term microorganisms?
,a) There is no difference between these two terms.
b) The term microbes is just a more casual way of saying microorganisms.
c) It includes viruses.
d) It includes fungus.
e) It includes archaea.
Answer: c
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
10) Which molecular tool MOST assisted in providing a more reliable way to verify the
assertions made by Woese et al. in their 1990 paper on phylogeny?
a) Polymerase chain reaction
b) RNA to DNA conversion using reverse transcriptase
c) RNA sequencing
d) DNA sequencing
e) Protein sequencing
Answer: a
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
11) If E. coli DNA polymerase, not Taq polymerase, were used in polymerase chain reaction
assays to amplify SSU rRNA gene sequences, we would expect to see
a) increased short fragment DNA sequences.
b) decreased short fragment DNA sequences.
c) the same number of short fragment DNA sequences.
d) increased long fragment DNA sequences.
e) decreased long fragment DNA sequences.
Answer: b
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
,12) This figure represents an artist's attempt to illustrate the process of PCR. What is the MOST
significant error you notice in this figure?
a) DNA strands are not fully denatured.
b) Primers are not annealed.
c) PCR products cannot separate from template DNA.
d) Taq polymerase is not shown in the illustration.
e) dNTPs are not shown in the illustration.
Answer: a
Difficulty: Hard
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
13) Select the answer with the correct order in which these structures evolved in plant cells.
a) Mitochondria, cell walls, chloroplasts
b) Mitochondria, chloroplasts, cell walls
c) Chloroplasts, mitochondria, cell walls
d) Chloroplasts, cell walls, mitochondria
e) Cell walls, mitochondria, chloroplasts
Answer: b
Difficulty: Medium
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
,14) Approximately when did primitive cells first appear on Earth?
a) 1 billion years ago
b) 2 billion years ago
c) 2.5 billion years ago
d) 3 billion years ago
e) 3.8 billion years ago
Answer: e
Difficulty: Easy
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
15) Which of these are fossilized microbial mats containing photosynthetic bacteria?
a) Stromatolites
b) Biofilms
c) Resin
d) Cyanobacteria
e) Stalagmites
Answer: a
Difficulty: Easy
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
16) Which statement below is FALSE concerning the atmosphere of early Earth?
a) The atmosphere was a reducing atmosphere.
b) Oxygen was present in very minute amounts.
c) Carbon dioxide was present in very minute amounts.
d) Hydrogen gas was present.
e) Nitrogen gas was present in very large amounts.
Answer: c
Difficulty: Easy
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
,Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
17) The discovery of ribozymes provides evidence that life on early Earth may have been based
on
a) DNA.
b) proteins.
c) RNA.
d) lipids.
e) polysaccharides.
Answer: c
Difficulty: Easy
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
18) The Endosymbiotic Theory is used to explain which of the following?
a) Rapid evolution of viruses
b) Antiphagocytic abilities of parasitic protozoa
c) Emergence of cell walls
d) Presence of mitochondria in eukarya
e) Development of the nucleus in eukarya
Answer: d
Difficulty: Medium
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
19) From which branch of the phylogenetic tree of life does the domain Eukarya originate?
a) Bacteria
b) Archaea
c) It is equal distance from both Bacteria and Archaea.
d) Eukarya is the originator of life, and Bacteria and Archaea branched off of that.
e) Eukarya, Bacteria, and Archaea are distinct groups and do not share any branches.
Answer: b
, Difficulty: Easy
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
20) A restriction endonuclease cuts DNA at the sequence ACGT. If we assume that all four bases
are equally represented in DNA, then how frequently will this sequence occur on a DNA strand?
a) Roughly every 100 base pairs
b) Roughly every 250 base pairs
c) Roughly every 1000 base pairs
d) Roughly every 10,000 base pairs
e) Roughly every 20,000 base pairs
Answer b
Difficulty: Hard
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
21) What disease was the first antimicrobial drug, Salvarsan, designed to treat?
a) Syphilis
b) Plague
c) Anthrax
d) Smallpox
e) Malaria
Answer: a
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
22) This figure relates to the flow of information from DNA to RNA to protein and shows how a
mutation in the DNA an alter the amino acid present in a protein. Select an alternative scenario(s)
Hello all ,
We have all what you need with best price
Our email :
Our website :
testbanks-store.com
,Package Title: Test Bank
Course Title: Wessner 3e
Chapter Number: 1 The Microbial World
Question Type: Multiple Choice
1) Which of these is considered to be the smallest unit of life?
a) A nucleus
b) A mitochondrion
c) A plasmid
d) A cell
e) A prion
Answer: d
Difficulty: Easy
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
2) The study of microbiology includes all of the following EXCEPT ________.
a) plants
b) viruses
c) bacteria
d) fungi
e) algae
Answer: a
Difficulty: Easy
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
3) What percent of the dry weight of the cell is composed of DNA?
a) 2–5
b) 12–15
c) 25–30
d) 35–40
,e) 50–55
Answer: a
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
4) What are the three domains of life?
a) Monera, Animals, and Plants
b) Bacteria, Archaea, and Eukarya
c) Prokaryote, Eukaryote, and Fungi
d) Animals, Plants, and Bacteria
e) Prokaryote, Eukaryote, and Archaea
Answer: b
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
5) Which of the characteristics of life is NOT displayed by any individual organism?
a) Metabolism
b) Growth
c) Reproduction
d) Evolution
e) Response
f) Homeostasis
Answer: d
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
6) Viruses are considered "nonliving" for all of the following reasons EXCEPT that they
a) need a host cell for replication.
b) are metabolically inert.
,c) possess a genome that can change over time.
d) do not maintain internal homeostasis.
e) are not responsive to environmental changes.
Answer: c
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
7) Which is a macromolecular difference between the domains Bacteria and Archaea?
a) Archaea contain a nucleus, but Bacteria do not.
b) Bacteria contain DNA, but Archaea do not.
c) Bacteria contain a plasma membrane, but Archaea do not.
d) Bacteria cell wall contains peptidoglycan, but the Archaea cell wall does not.
e) Archaea contain multiple types of RNA polymerase, but Bacteria has only one type.
Answer: d
Difficulty: Hard
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
8) The size and shapes of archaeal cells suggest relatedness to
a) bacteria.
b) prokaryotes.
c) eukarya.
d) all other life forms.
e) no other life forms; their sizes and shapes are unique.
Answer: a
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
9) Why is the term microbes more general than the term microorganisms?
,a) There is no difference between these two terms.
b) The term microbes is just a more casual way of saying microorganisms.
c) It includes viruses.
d) It includes fungus.
e) It includes archaea.
Answer: c
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
10) Which molecular tool MOST assisted in providing a more reliable way to verify the
assertions made by Woese et al. in their 1990 paper on phylogeny?
a) Polymerase chain reaction
b) RNA to DNA conversion using reverse transcriptase
c) RNA sequencing
d) DNA sequencing
e) Protein sequencing
Answer: a
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
11) If E. coli DNA polymerase, not Taq polymerase, were used in polymerase chain reaction
assays to amplify SSU rRNA gene sequences, we would expect to see
a) increased short fragment DNA sequences.
b) decreased short fragment DNA sequences.
c) the same number of short fragment DNA sequences.
d) increased long fragment DNA sequences.
e) decreased long fragment DNA sequences.
Answer: b
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
,12) This figure represents an artist's attempt to illustrate the process of PCR. What is the MOST
significant error you notice in this figure?
a) DNA strands are not fully denatured.
b) Primers are not annealed.
c) PCR products cannot separate from template DNA.
d) Taq polymerase is not shown in the illustration.
e) dNTPs are not shown in the illustration.
Answer: a
Difficulty: Hard
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
13) Select the answer with the correct order in which these structures evolved in plant cells.
a) Mitochondria, cell walls, chloroplasts
b) Mitochondria, chloroplasts, cell walls
c) Chloroplasts, mitochondria, cell walls
d) Chloroplasts, cell walls, mitochondria
e) Cell walls, mitochondria, chloroplasts
Answer: b
Difficulty: Medium
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
,14) Approximately when did primitive cells first appear on Earth?
a) 1 billion years ago
b) 2 billion years ago
c) 2.5 billion years ago
d) 3 billion years ago
e) 3.8 billion years ago
Answer: e
Difficulty: Easy
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
15) Which of these are fossilized microbial mats containing photosynthetic bacteria?
a) Stromatolites
b) Biofilms
c) Resin
d) Cyanobacteria
e) Stalagmites
Answer: a
Difficulty: Easy
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
16) Which statement below is FALSE concerning the atmosphere of early Earth?
a) The atmosphere was a reducing atmosphere.
b) Oxygen was present in very minute amounts.
c) Carbon dioxide was present in very minute amounts.
d) Hydrogen gas was present.
e) Nitrogen gas was present in very large amounts.
Answer: c
Difficulty: Easy
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
,Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
17) The discovery of ribozymes provides evidence that life on early Earth may have been based
on
a) DNA.
b) proteins.
c) RNA.
d) lipids.
e) polysaccharides.
Answer: c
Difficulty: Easy
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
18) The Endosymbiotic Theory is used to explain which of the following?
a) Rapid evolution of viruses
b) Antiphagocytic abilities of parasitic protozoa
c) Emergence of cell walls
d) Presence of mitochondria in eukarya
e) Development of the nucleus in eukarya
Answer: d
Difficulty: Medium
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
19) From which branch of the phylogenetic tree of life does the domain Eukarya originate?
a) Bacteria
b) Archaea
c) It is equal distance from both Bacteria and Archaea.
d) Eukarya is the originator of life, and Bacteria and Archaea branched off of that.
e) Eukarya, Bacteria, and Archaea are distinct groups and do not share any branches.
Answer: b
, Difficulty: Easy
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
20) A restriction endonuclease cuts DNA at the sequence ACGT. If we assume that all four bases
are equally represented in DNA, then how frequently will this sequence occur on a DNA strand?
a) Roughly every 100 base pairs
b) Roughly every 250 base pairs
c) Roughly every 1000 base pairs
d) Roughly every 10,000 base pairs
e) Roughly every 20,000 base pairs
Answer b
Difficulty: Hard
Section Reference: Section 1.2 Microbial Physiology, Genetics, and Cultivation
Learning Objective: LO 1.2 Define the conserved model of genetic transfer of information found
in all organisms on Earth, discussing the possible origins of life on Earth.
21) What disease was the first antimicrobial drug, Salvarsan, designed to treat?
a) Syphilis
b) Plague
c) Anthrax
d) Smallpox
e) Malaria
Answer: a
Difficulty: Medium
Section Reference: Section 1.1 The Microbes
Learning Objective: LO 1.1 Discuss what microbiology is and what separates it from other
biological sciences.
22) This figure relates to the flow of information from DNA to RNA to protein and shows how a
mutation in the DNA an alter the amino acid present in a protein. Select an alternative scenario(s)
