MICROBIOLOGY (BIOL 2321) EXAM 1
PRACTICE QUESTIONS AND ANSWERS
Which of the following statements is not applicable to microbes:
A) They are generally only able to be seen with the aid of a microscope.
B) They are visible to the naked eye when they form aggregations such as a biofilm or a
colony.
C) They are found within the Kingdoms Bacteria, Archaea, Protista, and Fungi
D) They do not include the viruses which are considered acellular.
E) All the above are applicable to microbes - Correct Answers -D) They do not include
the viruses which are considered acellular.
Microbes and/or microbial activities are involved in all of the following, except:
A) decomposition of organic matter in the soil
B) water treatment plant
C) production of vaccines and antibiotics
D) spontaneous generation
E) may biotechnology applications - Correct Answers -D) spontaneous generation
Which group of microorganisms includes many that grow in extreme environments on
Earth?
A) algae
B) bacteria
C) protists
D) archaea
E) fungi - Correct Answers -D) archaea
Which of the following requirements was necessary for Pasteur to disprove
spontaneous generation?
A) Keeping microorganisms out.
B) Removing microorganisms that were initially present.
C) Supplying air
D) Providing a food source that would support growth
E) All of the above - Correct Answers -E) All of the above
Which of the following is not necessary to establish that a certain bacterium causes a
disease?
A) obtain a pure culture of the bacterium from an infected animal
B) inject a healthy animal with a pure culture of the suspected bacterium
C) show that the bacterium is NOT present in healthy animals
, D) perform a Gram stain on the bacterial cells
E) show the same bacterium is isolated from infected animals - Correct Answers -D)
perform a Gram stain on the bacterial cells
Which of the following is not correctly matched?
A) Louis Pasteur: discoverer of rabies vaccine and bacterial fermentation
B) Robert Koch: developed pure culture technique
C) van Leeuwenhoek: first to visualize single-celled microbes
D) Aseptic technique: promoted by the use of antiseptics
E) Vaccination: involves the use of antibiotics such penicillin to treat disease - Correct
Answers -E) Vaccination: involves the use of antibiotics such penicillin to treat disease
Which of the following is not applicable to the prokaryotic cell membrane?
A) Prokaryotic cell membranes are comprised of phospholipids and proteins.
B) Gram-negative bacteria have two phospholipid-containing membranes
C) Hopanoids are small hydrophobic molecules that serve to reinforce the phospholipid
bilayer.
D) Mycobacteria and Archaea are prokaryotes whose phospholipid fatty acid structure
differs from other prokaryotes.
E) All are applicable to the prokaryotic cell membrane - Correct Answers -E) All are
applicable to the prokaryotic cell membrane
All of the following are components of peptidoglycan EXCEPT:
A) N-acetylglucosamine
B) N-acetylmuramic acid
C) lipopolysaccharide
D) amino acids
E) peptide cross-links - Correct Answers -C) lipopolysaccharide
Which of the following specialized structures or inclusions is not correctly paired?
A) Sulfur granules: found in bacteria that oxidize H2S to elemental sulfur
B) Lipid inclusions: storage polymers of inorganic phosphate
C) Magnetosomes: cells that have these can orient themselves directionally, i.e.,
north/south
D) Gas vacuoles: feature of aquatic bacteria
E) Carboxysomes: found in bacteria that utilize carbon dioxide. - Correct Answers -B)
Lipid inclusions: storage polymers of inorganic phosphate
All of the following are false regarding fimbriae, pili, and flagella, EXCEPT:
A) Fimbriae are generally used for motility toward an attractant.
B) Pili are more numerous in number than fimbriae and are used for attachment to
surfaces.
C) Flagellar movement toward an attractant results in fewer tumbles.
D) Flagellar motion is rotary like a propeller, rather than as a wave like a eukaryotic
flagellum.
PRACTICE QUESTIONS AND ANSWERS
Which of the following statements is not applicable to microbes:
A) They are generally only able to be seen with the aid of a microscope.
B) They are visible to the naked eye when they form aggregations such as a biofilm or a
colony.
C) They are found within the Kingdoms Bacteria, Archaea, Protista, and Fungi
D) They do not include the viruses which are considered acellular.
E) All the above are applicable to microbes - Correct Answers -D) They do not include
the viruses which are considered acellular.
Microbes and/or microbial activities are involved in all of the following, except:
A) decomposition of organic matter in the soil
B) water treatment plant
C) production of vaccines and antibiotics
D) spontaneous generation
E) may biotechnology applications - Correct Answers -D) spontaneous generation
Which group of microorganisms includes many that grow in extreme environments on
Earth?
A) algae
B) bacteria
C) protists
D) archaea
E) fungi - Correct Answers -D) archaea
Which of the following requirements was necessary for Pasteur to disprove
spontaneous generation?
A) Keeping microorganisms out.
B) Removing microorganisms that were initially present.
C) Supplying air
D) Providing a food source that would support growth
E) All of the above - Correct Answers -E) All of the above
Which of the following is not necessary to establish that a certain bacterium causes a
disease?
A) obtain a pure culture of the bacterium from an infected animal
B) inject a healthy animal with a pure culture of the suspected bacterium
C) show that the bacterium is NOT present in healthy animals
, D) perform a Gram stain on the bacterial cells
E) show the same bacterium is isolated from infected animals - Correct Answers -D)
perform a Gram stain on the bacterial cells
Which of the following is not correctly matched?
A) Louis Pasteur: discoverer of rabies vaccine and bacterial fermentation
B) Robert Koch: developed pure culture technique
C) van Leeuwenhoek: first to visualize single-celled microbes
D) Aseptic technique: promoted by the use of antiseptics
E) Vaccination: involves the use of antibiotics such penicillin to treat disease - Correct
Answers -E) Vaccination: involves the use of antibiotics such penicillin to treat disease
Which of the following is not applicable to the prokaryotic cell membrane?
A) Prokaryotic cell membranes are comprised of phospholipids and proteins.
B) Gram-negative bacteria have two phospholipid-containing membranes
C) Hopanoids are small hydrophobic molecules that serve to reinforce the phospholipid
bilayer.
D) Mycobacteria and Archaea are prokaryotes whose phospholipid fatty acid structure
differs from other prokaryotes.
E) All are applicable to the prokaryotic cell membrane - Correct Answers -E) All are
applicable to the prokaryotic cell membrane
All of the following are components of peptidoglycan EXCEPT:
A) N-acetylglucosamine
B) N-acetylmuramic acid
C) lipopolysaccharide
D) amino acids
E) peptide cross-links - Correct Answers -C) lipopolysaccharide
Which of the following specialized structures or inclusions is not correctly paired?
A) Sulfur granules: found in bacteria that oxidize H2S to elemental sulfur
B) Lipid inclusions: storage polymers of inorganic phosphate
C) Magnetosomes: cells that have these can orient themselves directionally, i.e.,
north/south
D) Gas vacuoles: feature of aquatic bacteria
E) Carboxysomes: found in bacteria that utilize carbon dioxide. - Correct Answers -B)
Lipid inclusions: storage polymers of inorganic phosphate
All of the following are false regarding fimbriae, pili, and flagella, EXCEPT:
A) Fimbriae are generally used for motility toward an attractant.
B) Pili are more numerous in number than fimbriae and are used for attachment to
surfaces.
C) Flagellar movement toward an attractant results in fewer tumbles.
D) Flagellar motion is rotary like a propeller, rather than as a wave like a eukaryotic
flagellum.
