BIOS242 TEST PAPER QUESTIONS AND
SOLUTIONS COMPLETE REVIEW MATERIAL
●● 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.
SOLUTIONS COMPLETE REVIEW MATERIAL
●● 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.
