FUNDAMENTALS OF MICROBIOLOGY WITH
LAB EXAM 3 ACTUAL TEST SCRIPT 2026
COMPLETE QUESTIONS AND ANSWERS
GRADED A+
◉ While virus, viroids, and other infectious agents such as prions
are also microscopic, Answer: they are not considered living
organisms because they are acellular (lacking a cell).
◉ Unicellular organisms (prokaryotes and eukaryotes) and many
multicellular organisms (eukaryotes) are Answer: microscopic living
organisms.
◉ An instrument called a _____________ is needed to magnify the image
of the microorganisms to observe them Answer: microscope
◉ Many microorganisms are capable of photosynthesis and generate
organic compounds that can be metabolized to produce energy.
Answer: Some bacteria and fungi are capable of decomposition and
play a crucial role in recycling nutrients in nature. Microbes are
diverse in their metabolic capabilities and this potential of microbes
is used in the science of bioremediation to stabilize the environment.
Using microbes to clean the environment of toxic chemicals is an
example of bioremediation.
,◉ While most microbes are useful and harmless, a small number of
microbes called pathogens can cause damage and are capable of
producing infections. They are called pathogens and are of immense
importance in human health. Answer: Photosynthetic
microorganisms (bacteria and algae) account for more than 70% of
the earth's photosynthesis, contributing the majority of the oxygen
to the atmosphere.
◉ Father of Microbiology who called microbes animalcules: Answer:
Antonie van Leeuwenhoek
◉ He was the first person to use swan neck flask to disapprove the
theory of spontaneous generation: Answer: was Louis Pasteur
◉ Which field of microbiology monitors and controls the spread of
diseases in communities? Answer: Public Health Microbiology and
Epidemiology monitors and controls the spread of diseases in
communities.
◉ According to Binomial system the scientific name of any living
organism has (select all that apply): Answer: a combination of the
generic (genus) and species name
,the genus name is always capitalized and the species name begins
with a lower case letter
both names should be italicized when in print or underlined when
written by hand
◉ Does not have membrane bound cellular organelles and has cell
wall made up of peptidoglycan: Answer: Bacteria do not have
membrane bound cellular organelle and has cell wall made up of
peptidoglycan.
◉ Protozoan: Answer: Vorticella
◉ Bacterium: Answer: E.coli
◉ Prokaryotes
Prokaryotes are unicellular microbes that lack a true nucleus.
Answer: Bacteria: These are single-celled prokaryotes whose cell
walls are composed of peptidoglycan (though some bacteria lack cell
walls). They reproduce asexually. Most are beneficial, but some are
pathogens that cause disease
, Archaea: Archaea are prokaryotes whose cell walls lack
peptidoglycan and instead are composed of other polymers. They
reproduce asexually. None are known to cause disease.
◉ Virus: Answer: Herpes simplex
◉ Eukaryotes
Eukaryotes are organisms whose cells contain a nucleus composed
of genetic material surrounded by a distinct membrane. Answer:
Fungi: Fungi are relatively large microscopic eukaryotes and include
multicellular molds and single-celled yeasts. These organisms obtain
their food from other organisms and have cell walls made of a
polymer called chitin.
Protozoa: Protozoa are single-celled eukaryotes that are similar to
animals in their nutritional needs and cellular structure. Most are
capable of locomotion, and some are pathogens that cause disease.
Algae: Algae are plantlike eukaryotes that are photosynthetic; that is,
they make their own food from carbon dioxide and water, using
energy from sunlight. The algae include multicellular and unicellular
organisms.
LAB EXAM 3 ACTUAL TEST SCRIPT 2026
COMPLETE QUESTIONS AND ANSWERS
GRADED A+
◉ While virus, viroids, and other infectious agents such as prions
are also microscopic, Answer: they are not considered living
organisms because they are acellular (lacking a cell).
◉ Unicellular organisms (prokaryotes and eukaryotes) and many
multicellular organisms (eukaryotes) are Answer: microscopic living
organisms.
◉ An instrument called a _____________ is needed to magnify the image
of the microorganisms to observe them Answer: microscope
◉ Many microorganisms are capable of photosynthesis and generate
organic compounds that can be metabolized to produce energy.
Answer: Some bacteria and fungi are capable of decomposition and
play a crucial role in recycling nutrients in nature. Microbes are
diverse in their metabolic capabilities and this potential of microbes
is used in the science of bioremediation to stabilize the environment.
Using microbes to clean the environment of toxic chemicals is an
example of bioremediation.
,◉ While most microbes are useful and harmless, a small number of
microbes called pathogens can cause damage and are capable of
producing infections. They are called pathogens and are of immense
importance in human health. Answer: Photosynthetic
microorganisms (bacteria and algae) account for more than 70% of
the earth's photosynthesis, contributing the majority of the oxygen
to the atmosphere.
◉ Father of Microbiology who called microbes animalcules: Answer:
Antonie van Leeuwenhoek
◉ He was the first person to use swan neck flask to disapprove the
theory of spontaneous generation: Answer: was Louis Pasteur
◉ Which field of microbiology monitors and controls the spread of
diseases in communities? Answer: Public Health Microbiology and
Epidemiology monitors and controls the spread of diseases in
communities.
◉ According to Binomial system the scientific name of any living
organism has (select all that apply): Answer: a combination of the
generic (genus) and species name
,the genus name is always capitalized and the species name begins
with a lower case letter
both names should be italicized when in print or underlined when
written by hand
◉ Does not have membrane bound cellular organelles and has cell
wall made up of peptidoglycan: Answer: Bacteria do not have
membrane bound cellular organelle and has cell wall made up of
peptidoglycan.
◉ Protozoan: Answer: Vorticella
◉ Bacterium: Answer: E.coli
◉ Prokaryotes
Prokaryotes are unicellular microbes that lack a true nucleus.
Answer: Bacteria: These are single-celled prokaryotes whose cell
walls are composed of peptidoglycan (though some bacteria lack cell
walls). They reproduce asexually. Most are beneficial, but some are
pathogens that cause disease
, Archaea: Archaea are prokaryotes whose cell walls lack
peptidoglycan and instead are composed of other polymers. They
reproduce asexually. None are known to cause disease.
◉ Virus: Answer: Herpes simplex
◉ Eukaryotes
Eukaryotes are organisms whose cells contain a nucleus composed
of genetic material surrounded by a distinct membrane. Answer:
Fungi: Fungi are relatively large microscopic eukaryotes and include
multicellular molds and single-celled yeasts. These organisms obtain
their food from other organisms and have cell walls made of a
polymer called chitin.
Protozoa: Protozoa are single-celled eukaryotes that are similar to
animals in their nutritional needs and cellular structure. Most are
capable of locomotion, and some are pathogens that cause disease.
Algae: Algae are plantlike eukaryotes that are photosynthetic; that is,
they make their own food from carbon dioxide and water, using
energy from sunlight. The algae include multicellular and unicellular
organisms.
