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BIOL 203 Microbiology LCC Final Exam (2 Latest Versions) /
BIOL 203 Microbiology LCC Final Preparation/BIOL 203
Microbiology LCC Final Practice Exam With Complete Questions
And Correct Answers| Brand New 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. - ANSWERS--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. -
ANSWERS--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? - ANSWERS--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 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
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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? - ANSWERS--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? - ANSWERS--The difference between a mixed culture and a
pure culture of microbes is that a 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. - ANSWERS--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.
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All bacteria make humans ill. - ANSWERS--False
In the three domain classification system, all prokaryotic cells are
grouped into Monera. - ANSWERS--False
Angelina Hesse suggested adding ______ as a thickener to broth in
order to make solid media. - ANSWERS--Agar
Koch's postulates were used - ANSWERS--to definitively link one
microorganism to one disease.
In this class of microorganisms, all members are prokaryotes. -
ANSWERS--bacteria
The theory that states life can arise from nonliving things and would
explain an infection by stating that first the body would be in a diseased
state after which microorganisms would appear is - ANSWERS--
spontaneous generation
How would you correctly abbreviate Helicobacter hepaticus? -
ANSWERS--H. hepaticus
Which of the following class(es) of microorganisms can exist as a
multicellular lifeform? (Select all that apply.) - ANSWERS--Helminthes
BIOL 203 Microbiology LCC Final Exam (2 Latest Versions) /
BIOL 203 Microbiology LCC Final Preparation/BIOL 203
Microbiology LCC Final Practice Exam With Complete Questions
And Correct Answers| Brand New 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. - ANSWERS--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. -
ANSWERS--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? - ANSWERS--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 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
,3|Page
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? - ANSWERS--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? - ANSWERS--The difference between a mixed culture and a
pure culture of microbes is that a 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. - ANSWERS--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.
, 4|Page
All bacteria make humans ill. - ANSWERS--False
In the three domain classification system, all prokaryotic cells are
grouped into Monera. - ANSWERS--False
Angelina Hesse suggested adding ______ as a thickener to broth in
order to make solid media. - ANSWERS--Agar
Koch's postulates were used - ANSWERS--to definitively link one
microorganism to one disease.
In this class of microorganisms, all members are prokaryotes. -
ANSWERS--bacteria
The theory that states life can arise from nonliving things and would
explain an infection by stating that first the body would be in a diseased
state after which microorganisms would appear is - ANSWERS--
spontaneous generation
How would you correctly abbreviate Helicobacter hepaticus? -
ANSWERS--H. hepaticus
Which of the following class(es) of microorganisms can exist as a
multicellular lifeform? (Select all that apply.) - ANSWERS--Helminthes
