BIOL 203 Microbiology LCC Final Exam
BIOL 203 MICROBIOLOGY LCC FINAL EXAM / BIOL 203 MICROBIOLOGY
LCC FINAL PREPARATION/BIOL 203 MICROBIOLOGY LCC FINAL
PRACTICE EXAM WITH COMPLETE QUESTIONS AND CORRECT
ANSWERS| BRAND NEW VERSION!
Why must an electron microscope be used to see most viruses? Why can't they be
seen using a light microscope? - Correct 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? -
Correct Answer-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. - Correct 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.
1|Page
, BIOL 203 Microbiology LCC Final Exam
All bacteria make humans ill. - Correct Answer-False
In the three domain classification system, all prokaryotic cells are grouped into
Monera. - Correct Answer-False
Angelina Hesse suggested adding ______ as a thickener to broth in order to make
solid media. - Correct Answer-Agar
Koch's postulates were used - Correct Answer-to definitively link one
microorganism to one disease.
In this class of microorganisms, all members are prokaryotes. - Correct Answer-
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 - Correct Answer-spontaneous generation
How would you correctly abbreviate Helicobacter hepaticus? - Correct Answer-H.
hepaticus
Which of the following class(es) of microorganisms can exist as a multicellular
lifeform? (Select all that apply.) - Correct Answer-Helminthes
Algae
Fungi
2|Page
, BIOL 203 Microbiology LCC Final Exam
Which of the following classes of microorganisms are made up of eukaryotic cells?
(Select all that apply.) - Correct Answer-fungi
algae
helminthe
protozoa
Which of the following classes of microorganisms contain even one member that
can make humans sick? - Correct Answer-fungi
bacteria
viruses
protozoa
algae
helminthes
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. - Correct Answer-1. Bacteria- prokaryotic
2. Archaea- prokaryotic
3. Algae- eukaryotic
4. Fungi- eukaryotic
5. Protozoa- eukaryotic
6. Helminthes- eukaryotic
7. Viruses- neither
3|Page
, BIOL 203 Microbiology LCC Final Exam
What is a bacterial endospore? Explain how endospore-forming bacteria could
cause a scientist to believe in spontaneous generation. - Correct Answer-A
bacterial endospore is an organism that is able to survive in extreme conditions
due to their tough structure.
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? - Correct 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 the domain and the organism works its way up to the top level,
which is species.
4|Page
BIOL 203 MICROBIOLOGY LCC FINAL EXAM / BIOL 203 MICROBIOLOGY
LCC FINAL PREPARATION/BIOL 203 MICROBIOLOGY LCC FINAL
PRACTICE EXAM WITH COMPLETE QUESTIONS AND CORRECT
ANSWERS| BRAND NEW VERSION!
Why must an electron microscope be used to see most viruses? Why can't they be
seen using a light microscope? - Correct 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? -
Correct Answer-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. - Correct 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.
1|Page
, BIOL 203 Microbiology LCC Final Exam
All bacteria make humans ill. - Correct Answer-False
In the three domain classification system, all prokaryotic cells are grouped into
Monera. - Correct Answer-False
Angelina Hesse suggested adding ______ as a thickener to broth in order to make
solid media. - Correct Answer-Agar
Koch's postulates were used - Correct Answer-to definitively link one
microorganism to one disease.
In this class of microorganisms, all members are prokaryotes. - Correct Answer-
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 - Correct Answer-spontaneous generation
How would you correctly abbreviate Helicobacter hepaticus? - Correct Answer-H.
hepaticus
Which of the following class(es) of microorganisms can exist as a multicellular
lifeform? (Select all that apply.) - Correct Answer-Helminthes
Algae
Fungi
2|Page
, BIOL 203 Microbiology LCC Final Exam
Which of the following classes of microorganisms are made up of eukaryotic cells?
(Select all that apply.) - Correct Answer-fungi
algae
helminthe
protozoa
Which of the following classes of microorganisms contain even one member that
can make humans sick? - Correct Answer-fungi
bacteria
viruses
protozoa
algae
helminthes
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. - Correct Answer-1. Bacteria- prokaryotic
2. Archaea- prokaryotic
3. Algae- eukaryotic
4. Fungi- eukaryotic
5. Protozoa- eukaryotic
6. Helminthes- eukaryotic
7. Viruses- neither
3|Page
, BIOL 203 Microbiology LCC Final Exam
What is a bacterial endospore? Explain how endospore-forming bacteria could
cause a scientist to believe in spontaneous generation. - Correct Answer-A
bacterial endospore is an organism that is able to survive in extreme conditions
due to their tough structure.
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? - Correct 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 the domain and the organism works its way up to the top level,
which is species.
4|Page
