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BIOL 203 Microbiology LCC Final Exam (2 Latest
Versions) / BIOL 203 Microbiology LCC Final
Preparation With Rationales/BIOL 203 Microbiology
LCC Final Practice Exam With Complete Questions
And Correct Answers| Newest Version!
There are two cell types - prokaryotic and eukaryotic. List
the 7 classes or basic types of microorganisms and
identify each as prokaryotic, eukaryotic, both prokaryotic
and eukaryotic, or neither. - Answer-1. Bacteria-
prokaryotic
2. Archaea- prokaryotic
3. Algae- eukaryotic
4. Fungi- eukaryotic
5. Protozoa- eukaryotic
6. Helminthes- eukaryotic
7. Viruses- neither
What is a bacterial endospore? Explain how endospore-
forming bacteria could cause a scientist to believe in
spontaneous generation. - Answer-A bacterial endospore
is an organism that is able to survive in extreme conditions
due to their tough structure.
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Endospore-forming bacteria could cause scientists to
believe in spontaneous generation because, they can
survive in extreme conditions that would normally kill
bacteria. In spontaneous generation, it is said that living
things appear from vital forces existing in nonliving or
decomposing matter, but there could be bacterial
endospore living in that situation without the scientists
knowing.
Describe how organisms are placed in the Three Domain
(Woese-Fox) classification system vs how organisms are
placed in the Five Kingdom (Traditional Wittaker)
classification system. Which classification system is more
useful to a microbiologist and why? - Answer-Organisms
are placed in the Three Domain classification system by
using the three main branches, "Bacteria," Archaea," and
"Eukarya." They are placed in each domain based on what
kind of cell they are (eukaryotic and prokaryotic). Although
prokaryotic cells are both Domain Bacteria and Domain
Archaea, the members of the Domain Archaea are very
different from the ones in Domain Bacteria as they are
able to live in severe environments and are also able to
produce metabolic byproducts.
Organisms are placed in the Five Kingdom classification
system by using certain levels that the organisms need to
pass in order to go on to the next level. The bottom level is
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the domain and the organism works its way up to the top
level, which is species.
It is more useful for a microbiologist to use the Three
Domain classification system because it classifies
organisms into smaller classifications rather than being
broad. The Five Kingdom classification system is more
observation based while the Three Domain classification
system is more DNA based.
Why must an electron microscope be used to see most
viruses? Why can't they be seen using a light microscope?
- Answer-An electron microscope must be used to see
most viruses because viruses are too small to be seen by
the optical microscope. The electron microscope has a
magnification of 5,000X to 1,000,000X and it does not use
light.
Viruses can't be seen using a light microscope because
light microscopes do not have as much magnification as
the electron microscope and you will not be able to see
the viruses.
What is the difference between a mixed culture and a pure
culture of microbes? - Answer-The difference between a
mixed culture and a pure culture of microbes is that a
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mixed culture are multiple species growing in a container
while a pure culture is one species growing in a container.
Mannitol Salt Agar and MacConkey Agar are two
examples of media that is both selective and differential. In
your own words describe what selective and differential
mean. - Answer-Selective- Contains one or more agents
that restrain growth of a certain microbe(s) but urge the
growth of another.
Differential- Allows several types of microbes to grow and
show differences among themselves.
All bacteria make humans ill. - Answer-False
In the three domain classification system, all prokaryotic
cells are grouped into Monera. - Answer-False
Angelina Hesse suggested adding ______ as a thickener
to broth in order to make solid media. - Answer-Agar
Koch's postulates were used - Answer-to definitively link
one microorganism to one disease.
BIOL 203 Microbiology LCC Final Exam (2 Latest
Versions) / BIOL 203 Microbiology LCC Final
Preparation With Rationales/BIOL 203 Microbiology
LCC Final Practice Exam With Complete Questions
And Correct Answers| Newest Version!
There are two cell types - prokaryotic and eukaryotic. List
the 7 classes or basic types of microorganisms and
identify each as prokaryotic, eukaryotic, both prokaryotic
and eukaryotic, or neither. - Answer-1. Bacteria-
prokaryotic
2. Archaea- prokaryotic
3. Algae- eukaryotic
4. Fungi- eukaryotic
5. Protozoa- eukaryotic
6. Helminthes- eukaryotic
7. Viruses- neither
What is a bacterial endospore? Explain how endospore-
forming bacteria could cause a scientist to believe in
spontaneous generation. - Answer-A bacterial endospore
is an organism that is able to survive in extreme conditions
due to their tough structure.
,2|Page
Endospore-forming bacteria could cause scientists to
believe in spontaneous generation because, they can
survive in extreme conditions that would normally kill
bacteria. In spontaneous generation, it is said that living
things appear from vital forces existing in nonliving or
decomposing matter, but there could be bacterial
endospore living in that situation without the scientists
knowing.
Describe how organisms are placed in the Three Domain
(Woese-Fox) classification system vs how organisms are
placed in the Five Kingdom (Traditional Wittaker)
classification system. Which classification system is more
useful to a microbiologist and why? - Answer-Organisms
are placed in the Three Domain classification system by
using the three main branches, "Bacteria," Archaea," and
"Eukarya." They are placed in each domain based on what
kind of cell they are (eukaryotic and prokaryotic). Although
prokaryotic cells are both Domain Bacteria and Domain
Archaea, the members of the Domain Archaea are very
different from the ones in Domain Bacteria as they are
able to live in severe environments and are also able to
produce metabolic byproducts.
Organisms are placed in the Five Kingdom classification
system by using certain levels that the organisms need to
pass in order to go on to the next level. The bottom level is
,3|Page
the domain and the organism works its way up to the top
level, which is species.
It is more useful for a microbiologist to use the Three
Domain classification system because it classifies
organisms into smaller classifications rather than being
broad. The Five Kingdom classification system is more
observation based while the Three Domain classification
system is more DNA based.
Why must an electron microscope be used to see most
viruses? Why can't they be seen using a light microscope?
- Answer-An electron microscope must be used to see
most viruses because viruses are too small to be seen by
the optical microscope. The electron microscope has a
magnification of 5,000X to 1,000,000X and it does not use
light.
Viruses can't be seen using a light microscope because
light microscopes do not have as much magnification as
the electron microscope and you will not be able to see
the viruses.
What is the difference between a mixed culture and a pure
culture of microbes? - Answer-The difference between a
mixed culture and a pure culture of microbes is that a
, 4|Page
mixed culture are multiple species growing in a container
while a pure culture is one species growing in a container.
Mannitol Salt Agar and MacConkey Agar are two
examples of media that is both selective and differential. In
your own words describe what selective and differential
mean. - Answer-Selective- Contains one or more agents
that restrain growth of a certain microbe(s) but urge the
growth of another.
Differential- Allows several types of microbes to grow and
show differences among themselves.
All bacteria make humans ill. - Answer-False
In the three domain classification system, all prokaryotic
cells are grouped into Monera. - Answer-False
Angelina Hesse suggested adding ______ as a thickener
to broth in order to make solid media. - Answer-Agar
Koch's postulates were used - Answer-to definitively link
one microorganism to one disease.
