MCB 3023 Final University of Florida | UPDATED Questions with 100%
Verified Answers
Question:
Which of these is characteristic of the enzyme nitrogenase?
It is irreversibly inactivated by oxygen.
It is found in both prokaryotes and eukaryotes.
It is found in all plant symbionts.
It converts dinitrogen to nitrate.
Answer:
It is irreversibly inactivated by oxygen.
Question:
What term applies to the oxidation of glucose to pyruvate for
the generation of energy?
lactate fermentation
glycolysis
gluconeogenesis
Krebs cycle
pentose phosphate pathway
Answer:
glycolysis
Question:
Lichens contain:
chemolithoautotrophs
at least one fungal heterotrophic partner and at least one
phototrophic partner
root nodules
a heterotrophic partner and at least one fungal phototrophic
partner
Answer:
at least one fungal heterotrophic partner and at least one phototrophic partner
,Question:
Which habitat is NOT inhabited by microorganisms?
ocean water
soil
none of these
human body
hot springs above 75°C
Answer:
none of these
Question:
Which of these is true of a mutualistic relationship?
Both organisms benefit.
One member benefits and the other member is harmed.
One member benefits and the other member does not receive
any benefit.
Neither organism benefits or is harmed by the relationship.
Answer:
Both organisms benefit.
Question:
Which statement below is FALSE concerning the atmosphere
of early earth?
The atmosphere was a reducing atmosphere
Nitrogen gas was present in very large amounts
Oxygen was present in very minute amounts
Carbon dioxide was present in very minute amounts
Hydrogen gas was present
Answer:
Carbon dioxide was present in very minute amounts
Question:
These genes are important for root nodule formation:
nod
,nif
nar
nir
Answer:
nod
Question:
What is the main function of peptidoglycan?
Regulating the transport of ions into the cell
Protecting against osmotic stress
Generating energy through electron transport
phosphorylation
Protecting the cell from harmful chemicals
Controlling movement of nutrients into and out of the cell
Answer:
Protecting against osmotic stress
Question:
Which genes are encoding for subunits of nitrogenase, the
main enzyme for nitrogen fixation?
nod genes
leghemoglobin genes
fix genes
nif genes
Answer:
nif genes
Question:
Which of these is considered to be the smallest unit of life?
the nucleus
the cell
a prion
the mitochondrion
, a plasmid
Answer:
the cell
Question:
What is the electron donor for bacterial symbionts of
tubeworms at hydrothermal vents?
oxygen
carbon dioxide
ferric iron (Fe3+)
H2S
Answer:
H2S
Question:
This early microbiologist used a swan-necked flask to help
disprove the Theory of Spontaneous Generation:
Edward Jenner
Louis Pasteur
Anton van Leeuwenhoek
Robert Koch
John Tyndall
Answer:
Louis Pasteur
Question:
What are Zooxanthellae?
Symbionts of tubeworms at hydrothermal vents
Symbionts of ruminants
Photosynthetic symbionts of corals
Heterotrophic symbionts of corals
Answer:
Verified Answers
Question:
Which of these is characteristic of the enzyme nitrogenase?
It is irreversibly inactivated by oxygen.
It is found in both prokaryotes and eukaryotes.
It is found in all plant symbionts.
It converts dinitrogen to nitrate.
Answer:
It is irreversibly inactivated by oxygen.
Question:
What term applies to the oxidation of glucose to pyruvate for
the generation of energy?
lactate fermentation
glycolysis
gluconeogenesis
Krebs cycle
pentose phosphate pathway
Answer:
glycolysis
Question:
Lichens contain:
chemolithoautotrophs
at least one fungal heterotrophic partner and at least one
phototrophic partner
root nodules
a heterotrophic partner and at least one fungal phototrophic
partner
Answer:
at least one fungal heterotrophic partner and at least one phototrophic partner
,Question:
Which habitat is NOT inhabited by microorganisms?
ocean water
soil
none of these
human body
hot springs above 75°C
Answer:
none of these
Question:
Which of these is true of a mutualistic relationship?
Both organisms benefit.
One member benefits and the other member is harmed.
One member benefits and the other member does not receive
any benefit.
Neither organism benefits or is harmed by the relationship.
Answer:
Both organisms benefit.
Question:
Which statement below is FALSE concerning the atmosphere
of early earth?
The atmosphere was a reducing atmosphere
Nitrogen gas was present in very large amounts
Oxygen was present in very minute amounts
Carbon dioxide was present in very minute amounts
Hydrogen gas was present
Answer:
Carbon dioxide was present in very minute amounts
Question:
These genes are important for root nodule formation:
nod
,nif
nar
nir
Answer:
nod
Question:
What is the main function of peptidoglycan?
Regulating the transport of ions into the cell
Protecting against osmotic stress
Generating energy through electron transport
phosphorylation
Protecting the cell from harmful chemicals
Controlling movement of nutrients into and out of the cell
Answer:
Protecting against osmotic stress
Question:
Which genes are encoding for subunits of nitrogenase, the
main enzyme for nitrogen fixation?
nod genes
leghemoglobin genes
fix genes
nif genes
Answer:
nif genes
Question:
Which of these is considered to be the smallest unit of life?
the nucleus
the cell
a prion
the mitochondrion
, a plasmid
Answer:
the cell
Question:
What is the electron donor for bacterial symbionts of
tubeworms at hydrothermal vents?
oxygen
carbon dioxide
ferric iron (Fe3+)
H2S
Answer:
H2S
Question:
This early microbiologist used a swan-necked flask to help
disprove the Theory of Spontaneous Generation:
Edward Jenner
Louis Pasteur
Anton van Leeuwenhoek
Robert Koch
John Tyndall
Answer:
Louis Pasteur
Question:
What are Zooxanthellae?
Symbionts of tubeworms at hydrothermal vents
Symbionts of ruminants
Photosynthetic symbionts of corals
Heterotrophic symbionts of corals
Answer:
