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Microbiology - Test Bank 2024/2025( 100% verified)
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Microbiology - Test Bank 2024/2025( 100% verified)
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Microbiology - Test BankWhich of these is considered to be the smallest unit of life?
a) the nucleus
b) the mitochondrion
c) a plasmid
d) the cell
e) a prion
d) The smallest unit of life is the cell.
The study of microbiology includes all of the following EXCEPT _____ .
a) plants
b) viruses
c) bacteria
d) fungi
e) algae
a) The study of microbiology includes all of the following EXCEPT plants.
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What percent of the dry weight of the cell is composed of DNA?
a) 2 - 5
b) 12 -15
c) 25 - 30
d) 35 -40
,e) 50 - 55
a) 2-5 % of the dry weight of the cell is composed of DNA
What are the three Domains of life?
a) Monera, Animals, and Plants
b) Bacteria, Archaea, and Eukarya
c) Prokaryote, Eukaryote, and Fungi
d) Animals, Plants, and Bacteria
e) Prokaryote, Eukaryote, Archaea
b) Bacteria, Achaea, and Eukarya are the three Domains of life.
Which of the characteristics of life is not displayed by any individual organism?
a) metabolism
b) growth
c) reproduction
d) evolution
e) response
f) homeostasis
d) Evolution is NOT a characteristic of life displayed by any individual organism.
Viruses are considered "nonliving" for all of the following reasons EXCEPT that they:
a) need a host cell for replication.
b) are metabolically inert.
c) possess DNA that can evolve.
d) do not maintain internal homeostasis.
e) are not responsive to environmental changes.
c) Viruses are considered "nonliving" for all of the following reasons EXCEPT that they possess
DNA that can evolve.
Which is a macromolecular difference between the Domains Bacteria and Archaea?
a) Archaea contain a nucleus and Bacteria do not.
b) Bacteria contain DNA and Archaea do not.
c) Bacteria contain a plasma membrane and Archaea do not.
d) Bacteria cell wall contains peptidoglycan and the Archaea cell wall does not.
e) Archaea contain multiple types of RNA polymerase and Bacteria has only one type.
, d) A macrobolecular difference between the Domains Bacteria and Archaea is that Bacteria cell
wall contains peptidoglycan and the Archaea cell wall does not.
The size and shapes of Archaean cells suggest relatedness to:
a) Bacteria
b) Prokaryotes
c) Eukaryotes
d) All other life forms
e) No other life forms; their sizes and shapes are unique
a) the size and shapes of Archaean cells suggest relatedness to Bacteria
Phosholipid structure in Archaean cells suggests relatedness to:
a) Bacteria
b) Prokaryotes
c) Eukaryotes
d) All other life forms
e) No other life forms; their structure is unique
e) Phospholipid structure in Archaean cells suggests relatedness to no other life forms; their
structure is unique
Which molecular tool most assisted in providing a more reliable way to verify the assertions
made by Woese et al in their 1990 paper on phylogeny?
a) Polymerase chain reaction
b) RNA to DNA conversion using reverse transcriptase
c) RNA sequencing
d) DNA sequencing
e) Protein sequencing
a) Polymerase chain reaction was the molecular tool used to provide a more reliable way to
verify the assertions made by Woese et al in their 1990 paper on phylogeny
If E. coli DNA polymerase, not Taq polymerase were used in polymerase chain reaction assays
to amplify SSUrRNA gene sequences, we would expect to see:
a) increased short fragment DNA sequences
b) decreased short fragment DNA sequences
c) the same number of short fragment DNA sequences
d) increasd long fragment DNA sequences
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