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BIOL 2040 - Chapter 27 Quiz Questions
with Detailed Verified Answers
Question: Life on Earth is classified into three domains. What are they?
Answer: Eukarya, Archaea and Bacteria
Question:
Domains of microorganisms whose cells have a prokaryotic structure. Their
cells lack nuclei with porous envelopes and other cellular features typical of
eukaryotes.
Answer: Archaea and Bacteria
Question:
Why type of group does not include all of the descendants of a single common
ancestor?
Answer: paraphyletic group
Question:
True or False? Archaea and bacteria include the smallest known cells and are
the most abundant organisms on Earth.
Answer: True
Question:
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What does the fact that organisms classified as domain Archaea share a
number of features with those classified in Eukarya suggest?
Answer: That they share a common ancestry
Question:
Archaea possess distinctive membrane phospholipids which are formed by
what type of bonds?
Answer: ether
Question:
What type of bonds characterize the membrane phospholipids of bacteria and
eukaryotes?
Answer: ester
Question:
These type of bonded membranes are resistant to damage by heat and other
extreme conditions, which helps explain why many archaea are able to grow in
extremely harsh conditions.
Answer: ether
Question:
What type of chains do archaea have in their membranes instead of fatty-acid
chains?
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Answer: isoprene chains
Question:
What is the difference in the cell walls of bacteria vs. archaea?
Answer: In most bacteria, the cell wall is composed of carbohydrates that are
cross-linked by peptides (forming a substance called peptidoglycan). The cell
wall of archaea is usually a surface layer of proteins.
Question:
True or False? Though many bacteria occur in soils and surface ocean waters in
moderate conditions, diverse bacteria occupy habitats with very high salt
content, acidity, methane levels, or temperatures that would kill most archaea
and eukaryotes.
Answer: False. Though many archaea occur in soils and surface ocean waters
in moderate conditions, diverse archaea occupy habitats with very high salt
content, acidity, methane levels, or temperatures that would kill most bacteria
and eukaryotes.
Question:
An organism that occurs primarily in extreme habitats.
Answer: extremophile
Question:
What is an example of an extremeophile?
BIOL 2040 - Chapter 27 Quiz Questions
with Detailed Verified Answers
Question: Life on Earth is classified into three domains. What are they?
Answer: Eukarya, Archaea and Bacteria
Question:
Domains of microorganisms whose cells have a prokaryotic structure. Their
cells lack nuclei with porous envelopes and other cellular features typical of
eukaryotes.
Answer: Archaea and Bacteria
Question:
Why type of group does not include all of the descendants of a single common
ancestor?
Answer: paraphyletic group
Question:
True or False? Archaea and bacteria include the smallest known cells and are
the most abundant organisms on Earth.
Answer: True
Question:
, Page | 2
What does the fact that organisms classified as domain Archaea share a
number of features with those classified in Eukarya suggest?
Answer: That they share a common ancestry
Question:
Archaea possess distinctive membrane phospholipids which are formed by
what type of bonds?
Answer: ether
Question:
What type of bonds characterize the membrane phospholipids of bacteria and
eukaryotes?
Answer: ester
Question:
These type of bonded membranes are resistant to damage by heat and other
extreme conditions, which helps explain why many archaea are able to grow in
extremely harsh conditions.
Answer: ether
Question:
What type of chains do archaea have in their membranes instead of fatty-acid
chains?
, Page | 3
Answer: isoprene chains
Question:
What is the difference in the cell walls of bacteria vs. archaea?
Answer: In most bacteria, the cell wall is composed of carbohydrates that are
cross-linked by peptides (forming a substance called peptidoglycan). The cell
wall of archaea is usually a surface layer of proteins.
Question:
True or False? Though many bacteria occur in soils and surface ocean waters in
moderate conditions, diverse bacteria occupy habitats with very high salt
content, acidity, methane levels, or temperatures that would kill most archaea
and eukaryotes.
Answer: False. Though many archaea occur in soils and surface ocean waters
in moderate conditions, diverse archaea occupy habitats with very high salt
content, acidity, methane levels, or temperatures that would kill most bacteria
and eukaryotes.
Question:
An organism that occurs primarily in extreme habitats.
Answer: extremophile
Question:
What is an example of an extremeophile?
