Biol 110 Exam 1 Questions With Complete Solutions
___________ is(are) the best source of fossils.
a) Igneous rock
b) Lava
c) Glaciers
d) Sedimentary rock Correct Answers d) Sedimentary rock
____________ is when organisms of different species both
benefit by living intimately for extended periods of time.
a) Mutualism
b) Parasitism
c) Predation
d) Commensalism Correct Answers a) Mutualism
A coccus bacterium, such as Streptococcus pneunoniae, would
be ________________.
a) rod-shaped
b) fuzzy
c) helical
d) round Correct Answers d) round
A hypothetical bacterium swims among human intestinal
contents until it finds a suitable location on the intestinal lining.
It adheres to the intestinal lining using a feature that also
protects it from phagocytes, bacteriophages, and dehydration.
Fecal matter from a human in whose intestine this bacterium
lives can spread the bacterium, even after being mixed with
water and boiled. The bacterium is not susceptible to the
penicillin family of antibiotics. It contains no plasmids and
,relatively little peptidoglycan. What should be true of the cell
wall of this bacterium?
a) After it has been subjected to Gram staining, the cell should
remain purple.
b) Its innermost layer is composed of a phospholipid bilayer.
c) It has an outer membrane of lipopolysaccharide.
d) It has a relatively large amount of peptidoglycan. Correct
Answers c) It has an outer membrane of lipopolysaccharide.
A paleontologist finds a new tyrannosaur in a site she is
excavating, and wishes to date the fossil. What is the most likely
method she will use?
a) All of these methods would provide a reliable estimate for the
age of this dinosaur fossil.
b) She will infer the age of the fossil by dating layers of volcanic
rock above and below the stratum containing the fossil using
radiometric dating.
c) She will determine the fossil's age by measuring the ratio of
carbon-14 to carbon-12 in the fossil.
d) She will infer the age of the fossil by collecting wood
fragments near the fossil and use dendrochonrology to date the
wood fragments. Correct Answers b) She will infer the age of
the fossil by dating layers of volcanic rock above and below the
stratum containing the fossil using radiometric dating.
A phage is a ________________.
a) mutant bacterium
b) virus that infects a bacterium
c) fertility factor
d) piece of bacterial DNA Correct Answers b) virus that infects
a bacterium
,A saprobe is an organism that ________.
a) converts nitrogen to ammonia
b) lives off decaying matter
c) converts carbon dioxide to sugars
d) undergoes anaerobic metabolism Correct Answers b) lives
off decaying matter
A water sample from a hot thermal vent contained a single-
celled organism that had a cell wall but lacked a nucleus. What
is its most likely classification?
a) Protista
b) Archaea
c) Eukarya
d) Fungi
e) Animalia Correct Answers b) Archaea
About 10% (or more) of us carry Stapylococcus aureus on our
skin as part of our normal flora. Upon wounding, these bacteria
can invade the bloodstream and lead to a variety of diseases.
This is one example of an opportunistic infection. If you are one
of the 10% affected and have no disease symptoms at this time,
then this symbiosis is categorized as a ________.
a) predation
b) mutualistic symbiosis
c) parasitic symbiosis
d) commensalistic symbiosis Correct Answers d)
commensalistic symbiosis
, According to the evidence for the early chemical evolution of
life, the atmosphere on early Earth was highly reductive because
it was lacking which of the following key molecules?
a) nitrogen
b) neon
c) oxygen
d) carbon dioxide Correct Answers c) oxygen
All of the following are functions of proteins EXCEPT
_____________.
a) storage of genetic information
b) skin coloration
c) digestion
d) oxygen transport Correct Answers a) storage of genetic
information
Although not present in all bacteria, this cell covering often
enables cells that possess it to resist the defenses of host
organisms, especially their phagocytic cells.
a) capsule
b) sex pilus
c) cell wall
d) endospore Correct Answers a) capsule
Amino acids are joined by _________.
a) peptide bonds
b) hydrogen bonds
c) ionic bonds
d) van der Waals interactions Correct Answers a) peptide bonds
An example of catabolism is the _________________.
___________ is(are) the best source of fossils.
a) Igneous rock
b) Lava
c) Glaciers
d) Sedimentary rock Correct Answers d) Sedimentary rock
____________ is when organisms of different species both
benefit by living intimately for extended periods of time.
a) Mutualism
b) Parasitism
c) Predation
d) Commensalism Correct Answers a) Mutualism
A coccus bacterium, such as Streptococcus pneunoniae, would
be ________________.
a) rod-shaped
b) fuzzy
c) helical
d) round Correct Answers d) round
A hypothetical bacterium swims among human intestinal
contents until it finds a suitable location on the intestinal lining.
It adheres to the intestinal lining using a feature that also
protects it from phagocytes, bacteriophages, and dehydration.
Fecal matter from a human in whose intestine this bacterium
lives can spread the bacterium, even after being mixed with
water and boiled. The bacterium is not susceptible to the
penicillin family of antibiotics. It contains no plasmids and
,relatively little peptidoglycan. What should be true of the cell
wall of this bacterium?
a) After it has been subjected to Gram staining, the cell should
remain purple.
b) Its innermost layer is composed of a phospholipid bilayer.
c) It has an outer membrane of lipopolysaccharide.
d) It has a relatively large amount of peptidoglycan. Correct
Answers c) It has an outer membrane of lipopolysaccharide.
A paleontologist finds a new tyrannosaur in a site she is
excavating, and wishes to date the fossil. What is the most likely
method she will use?
a) All of these methods would provide a reliable estimate for the
age of this dinosaur fossil.
b) She will infer the age of the fossil by dating layers of volcanic
rock above and below the stratum containing the fossil using
radiometric dating.
c) She will determine the fossil's age by measuring the ratio of
carbon-14 to carbon-12 in the fossil.
d) She will infer the age of the fossil by collecting wood
fragments near the fossil and use dendrochonrology to date the
wood fragments. Correct Answers b) She will infer the age of
the fossil by dating layers of volcanic rock above and below the
stratum containing the fossil using radiometric dating.
A phage is a ________________.
a) mutant bacterium
b) virus that infects a bacterium
c) fertility factor
d) piece of bacterial DNA Correct Answers b) virus that infects
a bacterium
,A saprobe is an organism that ________.
a) converts nitrogen to ammonia
b) lives off decaying matter
c) converts carbon dioxide to sugars
d) undergoes anaerobic metabolism Correct Answers b) lives
off decaying matter
A water sample from a hot thermal vent contained a single-
celled organism that had a cell wall but lacked a nucleus. What
is its most likely classification?
a) Protista
b) Archaea
c) Eukarya
d) Fungi
e) Animalia Correct Answers b) Archaea
About 10% (or more) of us carry Stapylococcus aureus on our
skin as part of our normal flora. Upon wounding, these bacteria
can invade the bloodstream and lead to a variety of diseases.
This is one example of an opportunistic infection. If you are one
of the 10% affected and have no disease symptoms at this time,
then this symbiosis is categorized as a ________.
a) predation
b) mutualistic symbiosis
c) parasitic symbiosis
d) commensalistic symbiosis Correct Answers d)
commensalistic symbiosis
, According to the evidence for the early chemical evolution of
life, the atmosphere on early Earth was highly reductive because
it was lacking which of the following key molecules?
a) nitrogen
b) neon
c) oxygen
d) carbon dioxide Correct Answers c) oxygen
All of the following are functions of proteins EXCEPT
_____________.
a) storage of genetic information
b) skin coloration
c) digestion
d) oxygen transport Correct Answers a) storage of genetic
information
Although not present in all bacteria, this cell covering often
enables cells that possess it to resist the defenses of host
organisms, especially their phagocytic cells.
a) capsule
b) sex pilus
c) cell wall
d) endospore Correct Answers a) capsule
Amino acids are joined by _________.
a) peptide bonds
b) hydrogen bonds
c) ionic bonds
d) van der Waals interactions Correct Answers a) peptide bonds
An example of catabolism is the _________________.
