Chapter 01: Microbes Shape Our History
MULTIPLE CHOICE
1. Which of the following is NOT considered a benefit of microorganisms?
a. nitrogen fixation c. synthesis of vitamins
b. production of fermented foods d. causative agents of disease
ANS: D DIF: Easy REF: 1.1
OBJ: 1.1a Describe how we define a microbe, and explain why the definition is a challenge.
MSC: Remembering
2. A microbe that is 50 nm in size would most likely be
a. fungi. c. virus.
b. E. coli. d. algae.
ANS: C DIF: Moderate REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
3. Based on the figure shown, the type of organism indicated with an arrow could be a
a. virus. c. macroscopic fungi.
b. bacteria. d. large ameba.
ANS: B DIF: Easy REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
4. Based on the figure, the type of organism shown is a(n)
, a. virus. c. archaea.
b. bacteria. d. eukaryote.
ANS: D DIF: Moderate REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
5. Which of the following demonstrates correct scientific notation of a bacterial organism?
a. Staphylococcus Epidermidis c. Staphylococcus epidermidis
b. Staphylococcus epidermidis d. Staphylococcus Epidermidis
ANS: C DIF: Easy REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
6. Which key characteristic differentiates a prokaryote from a eukaryote?
a. the absence of proteins
b. the presence of DNA
c. the absence of membrane-bound organelles
d. the presence of a cell wall
ANS: C DIF: Easy REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Remembering
7. Which of the following methods for classifying life forms can best be used to distinguish between two
closely related rod-shaped bacterial organisms, Salmonella typhimurium and Escherichia coli?
a. physical characteristics c. DNA sequence comparison
b. method of reproduction d. environmental habitat
ANS: C DIF: Moderate REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
8. Which of the following is always classified as a eukaryote?
a. papillomavirus c. Escherichia coli
b. methanogen d. yeast
ANS: D DIF: Moderate REF: 1.1
MULTIPLE CHOICE
1. Which of the following is NOT considered a benefit of microorganisms?
a. nitrogen fixation c. synthesis of vitamins
b. production of fermented foods d. causative agents of disease
ANS: D DIF: Easy REF: 1.1
OBJ: 1.1a Describe how we define a microbe, and explain why the definition is a challenge.
MSC: Remembering
2. A microbe that is 50 nm in size would most likely be
a. fungi. c. virus.
b. E. coli. d. algae.
ANS: C DIF: Moderate REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
3. Based on the figure shown, the type of organism indicated with an arrow could be a
a. virus. c. macroscopic fungi.
b. bacteria. d. large ameba.
ANS: B DIF: Easy REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
4. Based on the figure, the type of organism shown is a(n)
, a. virus. c. archaea.
b. bacteria. d. eukaryote.
ANS: D DIF: Moderate REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
5. Which of the following demonstrates correct scientific notation of a bacterial organism?
a. Staphylococcus Epidermidis c. Staphylococcus epidermidis
b. Staphylococcus epidermidis d. Staphylococcus Epidermidis
ANS: C DIF: Easy REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
6. Which key characteristic differentiates a prokaryote from a eukaryote?
a. the absence of proteins
b. the presence of DNA
c. the absence of membrane-bound organelles
d. the presence of a cell wall
ANS: C DIF: Easy REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Remembering
7. Which of the following methods for classifying life forms can best be used to distinguish between two
closely related rod-shaped bacterial organisms, Salmonella typhimurium and Escherichia coli?
a. physical characteristics c. DNA sequence comparison
b. method of reproduction d. environmental habitat
ANS: C DIF: Moderate REF: 1.1
OBJ: 1.1b Describe the three major domains of life: Archaea, Bacteria, and Eukarya. Explain what
the three domains have in common and how they differ. MSC: Applying
8. Which of the following is always classified as a eukaryote?
a. papillomavirus c. Escherichia coli
b. methanogen d. yeast
ANS: D DIF: Moderate REF: 1.1
