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Microbiology 2nd Edition Norman McKay By Lourdes P. Norman-McKay
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Microbiology 2nd Edition Norman McKay By Lourdes P. Norman-McKay
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Microbiology 2nd Edition Norman McKay By Lourdes P.Norman-McKay
identify which of the following are external structures used primarily for direct
contact interactions with other cells
a ) Flagella
b) Fimbriae
c) Cilia
d) Pili - ANSWER: PILI, Fimbriae
Which of the following describes movement towards or away from light ?
1) Phototaxis
2)Chemotaxis - ANSWER: Phototaxis
Which of the following bored through the stomach lining and causes gastric ulcers?
a) Klebsiella pneumoniae
B) Streptococcus pneumoniae
c) Proteus vulgaris
d) Helicobacter pylori - ANSWER: Helicobacter pylori
The main function of the external appendages known as ----------- is to stick to other
cells and surfaces, which may lead to aggregates known as biofilms and colonization
of microbes on inanimate objects. - ANSWER: Fimbriae
The transfer of DNA between bacterial cells is called --------- - ANSWER: Conjugation
Bacterial pili are composed of the protein ---------- - ANSWER: pilin
Bacteria are able to attach to surfaces and other bacteria using the surface
appendages known as --------- and ---------------. - ANSWER: fimbriae. pili
Which of the following bacteria could exhibit phototaxis?
a)Staphylococcus aureus
B)Helicobacter pylori
C)Escherichia coli
D)Photosynthetic bacteria - ANSWER: Photosynthetic bacteria
Neisseria gonorrhoeae binds to the epithelial cells of the reproductive tract by
means of which of the following?
a)Fimbriae
b)F pilus
c)Type IV pili
d)Peritrichous flagella - ANSWER: Type IV pili
, Which of the following bacteria use their flagella to invade mucus membranes and
cause infections?
a)Vibrio cholerae
b)Streptococcus pneumoniae
c)Helicobacter pylori
d)Bacillus anthracis - ANSWER: Vibrio cholerae, Helicobacter pylori
The -------- ----------- is a protective covering in some bacteria. It is composed of
thousands of copies of a single protein. - ANSWER: s layer
Elongated, rigid tubes on gram-negative bacteria that are involved in the transfer of
DNA from one cell to another are called which of the following?
a)Slime layers
b)Conjugation pili
c)Sex fimbriae
d)Axial filaments - ANSWER: Conjugation pili
What is the glycocalyx?
a)An intracellular substance that confers antibiotic resistance to the cell
b)An enzyme present in the periplasmic space
c)The major component of the bacterial cell wall
d)An extracellular coating that provides protection to the cell - ANSWER: An
extracellular coating that provides protection to the cell
Pili are typically used for which of the following?
a)Structural
b)Protection
c)Conjugation
d)Motility - ANSWER: Conjugation
Select all that apply
Identify the two types of glycocalyx in bacteria.
a)Capsules
b)Outer membrane
c)Peptidoglycan
d)Slime layer
e)Lipopolysaccharide - ANSWER: Capsules, Slime layer
The presence of type IV pili cause a type of twitching movement in bacteria of which
of the following genera?
a)Pseudomonas
b)Escherichia
c)Yersinia
d)Staphylococcus - ANSWER: Pseudomonas
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