STRAIGHTERLINE MICROBIOLOGY
UNIT 1-25 FINAL EXAM 2025
QUESTIONS AND ANSWERS
The sum total of all the microbes in a certain environment is termed the______
Select one:
a. biofilm
b. microbial niche
c. microbiome
d. phylogeny
e. domain - ANS Microbiome
Studies of the immune response to an infection caused by microorganisms would be performed
by a/an _______.
Select one:
a. hypersensitivity specialist
b. geomicrobiologist
c. epidemiologist
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d. immunologist - ANS Immunologist
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, Which of the following is NOT a recent discovery that has had a huge impact on the
understanding of microbiology?
Select one:
a. Human microbiome project
b. PCR technique
c. Small RNAs
d. Restriction enzymes
e. All are significant discoveries. - ANS All are significant discoveries
A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on
_______.
Select one:
a. determining if that species is the cause of a new disease
b. determining evolutionary relatedness
c. nomenclature
d. recombinant DNA
e. bioremediation - ANS Determining evolutionary relatedness
Which of the following historical microbiologists is incorrectly paired with his contribution to
the science?
Select one:
a. Francesco Redi: tested spontaneous generation with meat exposed to the air or covered with
2
cloth
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, b. Louis Pasteur: demonstrated that anthrax was caused by a bacterium
c. Joseph Lister: promoted disinfecting hands and air prior to surgery
d. Antonie van Leeuwenhoek:made and used quality magnifying lenses to observe and record
microorganisms - ANS Louis pasteur: Demonstrated the anthrax was caused by a bacterium
Which of the following is a taxon that contains all the other taxa listed?
Select one:
a. Phylum
b. Genus
c. Kingdom
d. Family
e. Species - ANS Kingdom
Which of the following are not considered microorganisms?
Select one:
a. Mosquitoes
b. Fungi
c. Bacteria
d. Viruses
e. Protozoa - ANS Mosquitoes
The microorganisms that recycle nutrients by breaking down dead matter and wastes are called
______.
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, Select one:
a. prokaryotes
b. decomposers
c. pathogens
d. fermenters
e. eukaryotes - ANS b. Decomposers
Which of the following is a unique characteristic of viruses that distinguishes them from the
other major groups of microorganisms?
Select one:
a. Cannot be seen without a microscope
b. Cause human disease
c. Lack a nucleus
d. Lack cell structure
e. Contain genetic material - ANS Lack of Cell structure
All cells contain _______.
Select one:
a. mitochondria to generate ATP
b. organelles for compartmentalization
c. ribosomes for protein synthesis
d. cell walls made of cellulose
e. uracil in their DNA - ANS c. ribosomes for protein synthesis
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Page
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UNIT 1-25 FINAL EXAM 2025
QUESTIONS AND ANSWERS
The sum total of all the microbes in a certain environment is termed the______
Select one:
a. biofilm
b. microbial niche
c. microbiome
d. phylogeny
e. domain - ANS Microbiome
Studies of the immune response to an infection caused by microorganisms would be performed
by a/an _______.
Select one:
a. hypersensitivity specialist
b. geomicrobiologist
c. epidemiologist
1
d. immunologist - ANS Immunologist
Page
@COPYRIGHT SIRJOEL 2025/2026
, Which of the following is NOT a recent discovery that has had a huge impact on the
understanding of microbiology?
Select one:
a. Human microbiome project
b. PCR technique
c. Small RNAs
d. Restriction enzymes
e. All are significant discoveries. - ANS All are significant discoveries
A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on
_______.
Select one:
a. determining if that species is the cause of a new disease
b. determining evolutionary relatedness
c. nomenclature
d. recombinant DNA
e. bioremediation - ANS Determining evolutionary relatedness
Which of the following historical microbiologists is incorrectly paired with his contribution to
the science?
Select one:
a. Francesco Redi: tested spontaneous generation with meat exposed to the air or covered with
2
cloth
Page
@COPYRIGHT SIRJOEL 2025/2026
, b. Louis Pasteur: demonstrated that anthrax was caused by a bacterium
c. Joseph Lister: promoted disinfecting hands and air prior to surgery
d. Antonie van Leeuwenhoek:made and used quality magnifying lenses to observe and record
microorganisms - ANS Louis pasteur: Demonstrated the anthrax was caused by a bacterium
Which of the following is a taxon that contains all the other taxa listed?
Select one:
a. Phylum
b. Genus
c. Kingdom
d. Family
e. Species - ANS Kingdom
Which of the following are not considered microorganisms?
Select one:
a. Mosquitoes
b. Fungi
c. Bacteria
d. Viruses
e. Protozoa - ANS Mosquitoes
The microorganisms that recycle nutrients by breaking down dead matter and wastes are called
______.
3
Page
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, Select one:
a. prokaryotes
b. decomposers
c. pathogens
d. fermenters
e. eukaryotes - ANS b. Decomposers
Which of the following is a unique characteristic of viruses that distinguishes them from the
other major groups of microorganisms?
Select one:
a. Cannot be seen without a microscope
b. Cause human disease
c. Lack a nucleus
d. Lack cell structure
e. Contain genetic material - ANS Lack of Cell structure
All cells contain _______.
Select one:
a. mitochondria to generate ATP
b. organelles for compartmentalization
c. ribosomes for protein synthesis
d. cell walls made of cellulose
e. uracil in their DNA - ANS c. ribosomes for protein synthesis
4
Page
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