TEST BANK
CH. 1: Microbial Life: Origin and Discovery
MULTIPLE CHOICE
1. Viruses are:
a. infectious agents that infect multi-cellular organisms
b. noncellular particles that take over the_ metabolism of a cell to generate more virus
particles
c. pathogens that replicate in complex growth media
d. cellular particles that belong to the_ archaea domain
e. microbes that consist of lipid membrane enclosed genomes
ANSWER: B DIF: Easy REF: 1.1 TOP: I.A | I.B
MSC: Remembering
2. Analysis of DNA sequences reveals:
a. the_ ancient convergence of two cell types, i.e., prokaryotes and eukaryotes
b. prokaryotes and eukaryotes evolved from a common ancestral cell
c. that bacteria share common ancestor with archaea, but not with eukarya
d. prokaryotes are cells with a nucleus
e. the_ genome of Haemophilus influenzae has about 2 billion base pairs
ANSWER: B DIF: Easy REF: 1.1 TOP: I.A | I.B
MSC: Remembering
3. Which of these groups are considered to be microbes but NOT considered to be cells?
a. viruses d. protists
b. bacteria e. filamentous fungi
, TEST BANK
c. archaea
ANSWER: A DIF: Easy REF: 1.1 TOP: I.A.i
MSC: Remembering
4. A microbe is commonly defined as:
a. a virus that requires a microscope to be seen
b. a bacterium that requires a microscope to be seen
c. a single-cellular prokaryote that requires a microscope to be seen
d. a multicellular eukaryote that requires a microscope to be seen
e. a living organism that requires a microscope to be seen
ANSWER: E DIF: Easy REF: 1.1 TOP: I.A.i | I.A.ii
MSC: Remembering
5. Which one of the_ following statements regarding microbial cells is NOT true?
a. Microbial cells acquire food, gain energy to build themselves, and respond to
environmental change.
b. Most single-celled organisms require a microscope to render them visible, but some
bacterial cells are large enough to be seen with naked eyes.
c. Microbes function as individual entities.
d. Many microbes form complex multicellular assemblages.
e. Viruses are not considered as microbial cells.
ANSWER: C DIF: Easy REF: 1.1 TOP: I.A.i | I.A.ii
MSC: Remembering
6. Which of the_ following statements is FALSE?
, TEST BANK
a. A genome is the_ total genetic information contained in an organism’s chromosomal
DNA.
b. If a microbe’s genome includes genes for nitrogenase, that microbe probably can fix
nitrogen.
c. By comparing DNA sequences of different organisms, we can figure out how closely
related they are.
d. Fred Sanger developed the_ first applicable DNA sequencing method.
e. Fred Sanger completed the_ sequences of Haemophilus influenzae.
ANSWER: E DIF: Easy REF: 1.1 TOP: I.B
MSC: Remembering
7. The_ first cellular genomes to be sequenced were those of:
a. humans d. prions
b. bacteria e. fungi
c. viruses
ANSWER: B DIF: Easy REF: 1.1 TOP: I.B.i
MSC: Remembering
8. The_ environment of early Earth may have contained all of the_ following EXCEPT:
a. ferrous iron d. oxygen
b. methane e. hydrogen gas
c. ammonia
ANSWER: D DIF: Easy REF: Special Topic 1.1
TOP: II.D MSC: Remembering
9. The_ development of the_ theory of the_ “RNA world” resulted from the_ discovery of:
a. archaea d. ribozymes
, TEST BANK
b. prions e. endosymbionts
c. bacteria
ANSWER: D DIF: Medium REF: Special Topic 1.1
TOP: II.D MSC: Remembering
10. Which microbes may resemble those of the_ earliest life forms?
a. archaea d. cyanobacteria
b. photosynthetic algae e. protists
c. viruses
ANSWER: A DIF: Medium REF: Special Topic 1.1
TOP: II.D MSC: Remembering
11. Early metabolism may have been catalyzed by:
a. DNA d. amino acids
b. RNA e. carbohydrates
c. protein
ANSWER: B DIF: Medium REF: Special Topic 1.1
TOP: II.D MSC: Remembering
12. Which of the_ following diseases accounts for more than half of all human mortality?
a. cardiovascular disease d. microbial disease
b. cancer e. strokes
c. accidents
ANSWER: D DIF: Easy REF: 1.2 TOP: II.A
CH. 1: Microbial Life: Origin and Discovery
MULTIPLE CHOICE
1. Viruses are:
a. infectious agents that infect multi-cellular organisms
b. noncellular particles that take over the_ metabolism of a cell to generate more virus
particles
c. pathogens that replicate in complex growth media
d. cellular particles that belong to the_ archaea domain
e. microbes that consist of lipid membrane enclosed genomes
ANSWER: B DIF: Easy REF: 1.1 TOP: I.A | I.B
MSC: Remembering
2. Analysis of DNA sequences reveals:
a. the_ ancient convergence of two cell types, i.e., prokaryotes and eukaryotes
b. prokaryotes and eukaryotes evolved from a common ancestral cell
c. that bacteria share common ancestor with archaea, but not with eukarya
d. prokaryotes are cells with a nucleus
e. the_ genome of Haemophilus influenzae has about 2 billion base pairs
ANSWER: B DIF: Easy REF: 1.1 TOP: I.A | I.B
MSC: Remembering
3. Which of these groups are considered to be microbes but NOT considered to be cells?
a. viruses d. protists
b. bacteria e. filamentous fungi
, TEST BANK
c. archaea
ANSWER: A DIF: Easy REF: 1.1 TOP: I.A.i
MSC: Remembering
4. A microbe is commonly defined as:
a. a virus that requires a microscope to be seen
b. a bacterium that requires a microscope to be seen
c. a single-cellular prokaryote that requires a microscope to be seen
d. a multicellular eukaryote that requires a microscope to be seen
e. a living organism that requires a microscope to be seen
ANSWER: E DIF: Easy REF: 1.1 TOP: I.A.i | I.A.ii
MSC: Remembering
5. Which one of the_ following statements regarding microbial cells is NOT true?
a. Microbial cells acquire food, gain energy to build themselves, and respond to
environmental change.
b. Most single-celled organisms require a microscope to render them visible, but some
bacterial cells are large enough to be seen with naked eyes.
c. Microbes function as individual entities.
d. Many microbes form complex multicellular assemblages.
e. Viruses are not considered as microbial cells.
ANSWER: C DIF: Easy REF: 1.1 TOP: I.A.i | I.A.ii
MSC: Remembering
6. Which of the_ following statements is FALSE?
, TEST BANK
a. A genome is the_ total genetic information contained in an organism’s chromosomal
DNA.
b. If a microbe’s genome includes genes for nitrogenase, that microbe probably can fix
nitrogen.
c. By comparing DNA sequences of different organisms, we can figure out how closely
related they are.
d. Fred Sanger developed the_ first applicable DNA sequencing method.
e. Fred Sanger completed the_ sequences of Haemophilus influenzae.
ANSWER: E DIF: Easy REF: 1.1 TOP: I.B
MSC: Remembering
7. The_ first cellular genomes to be sequenced were those of:
a. humans d. prions
b. bacteria e. fungi
c. viruses
ANSWER: B DIF: Easy REF: 1.1 TOP: I.B.i
MSC: Remembering
8. The_ environment of early Earth may have contained all of the_ following EXCEPT:
a. ferrous iron d. oxygen
b. methane e. hydrogen gas
c. ammonia
ANSWER: D DIF: Easy REF: Special Topic 1.1
TOP: II.D MSC: Remembering
9. The_ development of the_ theory of the_ “RNA world” resulted from the_ discovery of:
a. archaea d. ribozymes
, TEST BANK
b. prions e. endosymbionts
c. bacteria
ANSWER: D DIF: Medium REF: Special Topic 1.1
TOP: II.D MSC: Remembering
10. Which microbes may resemble those of the_ earliest life forms?
a. archaea d. cyanobacteria
b. photosynthetic algae e. protists
c. viruses
ANSWER: A DIF: Medium REF: Special Topic 1.1
TOP: II.D MSC: Remembering
11. Early metabolism may have been catalyzed by:
a. DNA d. amino acids
b. RNA e. carbohydrates
c. protein
ANSWER: B DIF: Medium REF: Special Topic 1.1
TOP: II.D MSC: Remembering
12. Which of the_ following diseases accounts for more than half of all human mortality?
a. cardiovascular disease d. microbial disease
b. cancer e. strokes
c. accidents
ANSWER: D DIF: Easy REF: 1.2 TOP: II.A
