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
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: Understanding
9. Which of the following has been used as a tool for gene therapy?
a. viruses c. protozoa
b. archaea d. fungi
ANS: A 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: Understanding
10. Which of the following would you not expect to find in the human digestive tract?
a. archaea c. bacteria
b. algae d. intestinal viruses
ANS: B 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: Understanding
11. Antibiotics are chemotherapeutic drugs that function by inhibiting an important cellular structure
or process of an organism that is causing an infection. Which of the following would not be
affected by an antibiotic that targets cellular metabolic enzymes?
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
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: Understanding
9. Which of the following has been used as a tool for gene therapy?
a. viruses c. protozoa
b. archaea d. fungi
ANS: A 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: Understanding
10. Which of the following would you not expect to find in the human digestive tract?
a. archaea c. bacteria
b. algae d. intestinal viruses
ANS: B 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: Understanding
11. Antibiotics are chemotherapeutic drugs that function by inhibiting an important cellular structure
or process of an organism that is causing an infection. Which of the following would not be
affected by an antibiotic that targets cellular metabolic enzymes?
