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Which of the following characteristics is not a property of cells or living things?


A) Cell boundary
B) Ability to replicate
C) Nucleus
D) Responds to stimulus
E) All of the choices are correct

F) A) and E)
G) B) and D)

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The region between the bacterial cell membrane and the cell wall is called the outer membrane.

A) True
B) False

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The function of bacterial endospores is


A) to convert gaseous nitrogen to a usable form for plants.
B) for reproduction and growth.
C) for protection of genetic material during harsh conditions.
D) the storage of excess cell materials.
E) to have sites for photosynthesis.

F) A) and B)
G) B) and C)

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Lipopolysaccharide is an important cell wall component of


A) gram-negative bacteria.
B) gram-positive bacteria.
C) acid-fast bacteria.
D) mycoplasmas.
E) protoplasts.

F) A) and D)
G) A) and C)

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Thiomargarita namibia is the smallest bacteria known to man.

A) True
B) False

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A prokaryotic ribosome has a 70 S size composed of two smaller subunits of which the smaller subunit is S size.1-16-2013

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Spirochetes have a twisting and flexing locomotion due to appendages called


A) flagella.
B) cilia.
C) fimbriae.
D) periplasmic flagella (axial filaments) .
E) sex pili.

F) None of the above
G) A) and B)

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Hot Carbol Fuchsin is the primary dye in the acid fast stain.

A) True
B) False

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All of the following are correct about a slime layer, except


A) it is a type of glycocalyx.
B) it can be easily washed off the cell.
C) it protects the cell from loss of water and nutrients.
D) it plays a role in cell motility.
E) it allows cells to participate in biofilms.

F) B) and C)
G) D) and E)

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The periplasmic space is


A) larger in gram-positive bacteria.
B) made up of lipopolysaccharides and phospholipids.
C) an important reaction site for substances entering and leaving the cell.
D) where peptidoglycan is located.
E) absent in gram-negative bacteria.

F) C) and D)
G) B) and E)

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The prokaryotic flagellum has three parts: the _____, the hook, and the basal body.

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An important indicator of evolutionary relatedness is to determine


A) size of the periplasmic space.
B) similarities of cell membrane proteins.
C) size of the bacterial chromosome.
D) nitrogen base sequence of rRNA.
E) size of the ribosomes.

F) C) and E)
G) A) and E)

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Which statement is not a characteristic of biofilms?


A) They can be involved with human disease.
B) They involve bacteria only.
C) They evolve and adapt to their surroundings.
D) They are very difficult to eliminate with antimicrobials.
E) They can accumulate on living and non-living surfaces.

F) B) and D)
G) C) and D)

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