TEST BANK for Microbiology: An Evolving Science 5th Edition by Slonczewski & Foster; ISBN: 9780393419962, VH 1 TO 5//100% VERIFIED

,
,CHAPTER 1: Microbial Life: Origin and Discovery
XF XF XF XF XF XF




MULTIPLE CHOICE
XF




1. Viruses are: XF



a. infectious agents that infect multi-cellular organisms XF XF XF XF XF



b. noncellular particles that take over the metabolism of a cell to generate more viruspa
XF XF XF XF XF XF XF XF XF XF XF XF XF X
F



rticles
c. pathogens that replicate in complex growth media XF XF XF XF XF XF



d. cellular particles that belong to the archaea domain
XF XF XF XF XF XF XF


e. microbes that consist of lipid membrane enclosed genomes XF XF XF XF XF XF XF




ANS: B DIF:
X F Easy REF: 1.1 XFXFXF TOP: I.A | I.B
X F XF XF


MSC: Remembering
X F




2. Analysis of DNA sequences reveals:
XF XF XF XF


a. the ancient convergence of two cell types, i.e., prokaryotes and eukaryotes
XF XF XF XF XF XF XF XF XF XF



b. prokaryotes and eukaryotes evolved from a common ancestral cell XF XF XF XF XF XF XF XF



c. that bacteria share common ancestor with archaea, but not with eukarya
XF XF XF XF XF XF XF XF XF XF



d. prokaryotes are cells with a nucleus XF XF XF XF XF


e. the genome of Haemophilus influenzae has about 2 billion base pairs
XF XF XF XF XF XF XF XF XF XF




ANS: B DIF:
X F Easy REF: 1.1 XFXFXF TOP: I.A | I.B
X F XF XF


MSC: Remembering
X F




3. Which of these groups are considered to be microbes but NOT considered to be cells?
XF XF XF XF XF XF XF XF XF XF XF XF XF XF


a. viruses d. protists
b. bacteria e. filamentous fungi XF



c. archaea
ANS: A DIF:
X F Easy REF: 1.1 XFXFXF TOP: I.A.i X F



MSC: Remembering
X F




4. A microbe is commonly defined as:
XF XF XF XF XF


a. a virus that requires a microscope to be seen
XF XF XF XF XF XF XF XF



b. a bacterium that requires a microscope to be seen
XF XF XF XF XF XF XF XF



c. a single-cellular prokaryote that requires a microscope to be seen
XF XF XF XF XF XF XF XF XF



d. a multicellular eukaryote that requires a microscope to be seen
XF XF XF XF XF XF XF XF XF



e. a living organism that requires a microscope to be seen
XF XF XF XF XF XF XF XF XF




ANS: E DIF:
X F Easy REF: 1.1 XFXFXF TOP: I.A.i | I.A.ii
X F XF XF



MSC: Remembering
X F




5. Which one of the following statements regarding microbial cells is NOT true?
XF XF XF XF XF XF XF XF XF XF XF



a. Microbial cells acquire food, gain energy to build themselves, and respond to
XF XF XF XF XF XF XF XF XF XF XF


environmental change. XF

, b. Most single-celled organisms require a microscope to render them visible, but some
XF XF XF XF XF XF XF XF XF XF XF


bacterial cells are large enough to be seen with naked eyes.
XF XF XF XF XF XF XF XF XF XF



c. Microbes function as individual entities.
XF XF XF XF



d. Many microbes form complex multicellular assemblages.
XF XF XF XF XF



e. Viruses are not considered as microbial cells.
XF XF XF XF XF XF




ANS: C X FDIF: Easy REF: 1.1 XFXFXF TOP: I.A.i | I.A.ii X F XF XF



MSC: Remembering
X F




6. Which of the following statements is FALSE?
XF XF XF XF XF XF


a. A genome is the total genetic information contained in an organism’s chromosomal DNA.
XF XF XF XF XF XF XF XF XF XF XF XF



b. If a microbe’s genome includes genes for nitrogenase, that microbe probably can fixnitrogen.
XF XF XF XF XF XF XF XF XF XF XF XF X
F




c. By comparing DNA sequences of different organisms, we can figure out how closely
XF XF XF XF XF XF XF XF XF XF XF XF


related they are. XF XF



d. Fred Sanger developed the first applicable DNA sequencing method.
XF XF XF XF XF XF XF XF


e. Fred Sanger completed the sequences of Haemophilus influenzae.
XF XF XF XF XF XF XF




ANS: E X FDIF: Easy REF: 1.1 XFXFXF TOP: I.B X F



MSC: Remembering
X F




7. The first cellular genomes to be sequenced were those of:
XF XF XF XF XF XF XF XF XF


a. humans d. prions
b. bacteria e. fungi
c. viruses
ANS: B X FDIF: Easy REF: 1.1 XFXFXF TOP: I.B.i X F



MSC: Remembering
X F




8. The environment of early Earth may have contained all of the following EXCEPT:
XF XF XF XF XF XF XF XF XF XF XF XF


a. ferrous iron XF d. oxygen
b. methane e. hydrogen gas XF



c. ammonia
ANS: D X F DIF: Easy
REF: Special Topic 1.1TOP:
XF XF XF X
F X F II.D
MSC: Remembering X F




9. The development of the theory of the ―RNA world‖ resulted from the discovery of:
XF XF XF XF XF XF XF XF XF XF XF XF XF



a. archaea d. ribozymes
b. prions e. endosymbionts
c. bacteria
ANS: D X F DIF: Medium
REF: Special Topic 1.1TOP:
XF XF XF X
F X F II.D
MSC: Remembering X F




10. Which microbes may resemble those of the earliest life forms?
XF XF XF XF XF XF XF XF XF



a. archaea d. cyanobacteria
b. photosynthetic algae e. protists XF



c. viruses
ANS: A X F DIF: Medium
REF: Special Topic 1.1TOP:
XF XF XF X
F X F II.D
MSC: Remembering X F




11. Early metabolism may have been catalyzed by:
XF XF XF XF XF XF



a. DNA d. amino acids XF


b. RNA e. carbohydrates