TEST BANK Microbiology An Evolving Science, 6th Edition, John Foster & Joan Slonczewski, All Chapter 1 - 28

TEST BANK nn




Microbiology An Evolving Science, 6th Edition,
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n n John Foster & Joan Slonczewski, All Chapter 1
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n n -
28

,
,CHAPTER 1: Microbial Life: Origin and Discovery
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MULTIPLE CHOICE
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1. Viruses are: nn



a. infectious agents that infect multi-cellular organismsnn nn nn nn nn



b. noncellular particles that take over the metabolism of a cell to
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generate more virusparticles
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c. pathogens that replicate in complex growth media nn nn nn nn nn nn



d. cellular particles that belong to the archaea domain
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e. microbes that consist of lipid membrane enclosed genomes
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ANS: n n B DIF: Easy REF: 1.1 TOP: n n I.A | I.B
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MSC: n n Remembering

2. Analysis of DNA sequences reveals:
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a. the ancient convergence of two cell types, i.e., prokaryotes
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and eukaryotes
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b. prokaryotes and eukaryotes evolved from a common ancestral cell nn nn nn nn nn nn nn nn


c. that bacteria share common ancestor with archaea, but not
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with eukarya
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d. prokaryotes are cells with a nucleus nn nn nn nn nn


e. the genome of Haemophilus influenzae has about 2 billion
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base pairs
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ANS: n n B DIF: Easy REF: 1.1 TOP: n n I.A | I.B
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MSC: n n Remembering

3. Which of these groups are considered to be microbes but NOT considered to be cells?
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a. viruses d. protists n n n n



b. bacteria e. filamentous fungi nn



c. archaea
ANS: n n A DIF: Easy REF: 1.1 TOP: n n I.A.i
MSC: n n Remembering

4. A microbe is commonly defined as:
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a. a virus that requires a microscope to be seen
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b. a bacterium that requires a microscope to be seen
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c. a single-cellular prokaryote that requires a microscope
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to be seen
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d. a multicellular eukaryote that requires a microscope to
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be seen
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e. a living organism that requires a microscope to be seen
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ANS: n n E DIF: Easy REF: 1.1 TOP: n n I.A.i | I.A.ii
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MSC: n n Remembering

5. Which one of the following statements regarding microbial cells is NOT true?
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a. Microbial cells acquire food, gain energy to build themselves,
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and respond to
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environmental change. nn

, b. Most single-celled organisms require a microscope to render them visible,
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but some
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bacterial cells are large enough to be seen with naked eyes.
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c. Microbes function as individual entities. nn nn nn nn



d. Many microbes form complex multicellular assemblages.
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e. Viruses are not considered as microbial cells.
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ANS: n n C DIF: Easy REF: 1.1 TOP: n n I.A.i | I.A.ii
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MSC: n n Remembering

6. Which of the following statements is FALSE?
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a. A genome is the total genetic information contained in an
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organism’s chromosomal DNA.
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b. If a microbe’s genome includes genes for nitrogenase, that microbe probably
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can fixnitrogen.
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c. By comparing DNA sequences of different organisms, we can figure out
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how closely
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related they are. nn nn


d. Fred Sanger developed the first applicable DNA sequencing method.
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e. Fred Sanger completed the sequences of Haemophilus influenzae.
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ANS: n n E DIF: Easy REF: 1.1 TOP: n n I.B
MSC: n n Remembering

7. The first cellular genomes to be sequenced were those of:
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a. humans d. prions n n n n



b. bacteria e. fungi
c. viruses
ANS: n n B DIF: Easy REF: 1.1 TOP: n n I.B.i
MSC: n n Remembering

8. The environment of early Earth may have contained all of the following EXCEPT:
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a. ferrous iron nn d. oxygen n n n n



b. methane e. hydrogen gas nn



c. ammonia
ANS: D n n DIF: Easy REF: Special Topic nn nn



1.1TOP: n n n n II.D MSC: Remembering n n




9. The development of the theory of the ―RNA world‖ resulted from the discovery of:
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a. archaea d. ribozymes n n n n



b. prions e. endosymbionts
c. bacteria
ANS: D n n DIF: Medium REF: Special Topic nn nn



1.1TOP: n n n n II.D MSC: Remembering n n




10. Which microbes may resemble those of the earliest life forms?
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a. archaea d. cyanobacteria n n n n



b. photosynthetic algae e. protists nn



c. viruses
ANS: A n n DIF: Medium REF: Special Topic nn nn



1.1TOP: n n n n II.D MSC: Remembering n n




11. Early metabolism may have been catalyzed by:
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a. DNA d. amino acids n n n n nn



b. RNA e. carbohydrates