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WGU C453 Microbiology OA Review - Questions With Complete Solutions (Rated A+)
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WGU C453 Microbiology OA Review - Questions With Complete Solutions (Rated A+)
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WGU C453 Microbiology OA Review - Questions WithComplete Solutions (Rated A+)
What connects bacterial cells during the exchange of genetic material?
a. flagellum
b. nucleoid region
c. cell wall
d. pilus Right Ans - d. pilus
Which of the following is a function of peptidoglycan?
a. Promotes phagocytosis
b. Protects cells from bursting
c. Allows bacteria to adhere to surfaces and each other
d. Regulates movement of substances into and out of the bacterial cell
Right Ans - b. Protects cells from bursting
What term is used to describe bacterial cells that are spherical in shape?
a. Bacillus
b. Coccus
c. Spirillum
d. Vibrio Right Ans - b. Coccus
Which of the following structures is associated with Gram-positive bacteria?
a. Teichoic acid
b. Periplasmic space
c. Peptidoglycan
d. Lipopolysaccharide Right Ans - a. Teichoic acid
Which of the following microorganisms lack mitochondria?
a. Fungi
b. Bacteria
c. Parasites
d. Protists Right Ans - b. Bacteria
Which of the following statements about endospores is false?
a. They are resistant to heat and drying.
b. Clostridium are capable of producing endospores.
c. They are used for reproduction.
,d. Endospore formation begins with the building of the endospore septum.
Right Ans - c. They are used for reproduction.
Which bacteria have cell walls that are approximately 10-20% peptidoglycan?
a. Gram-positive
b. Gram-negative
c. Acid-fast
d. Wall-deficient Right Ans - b. Gram-negative
Which bacteria are difficult to Gram stain?
a. Grampositive
b. Gramnegative
c. Acidfast
d. Walldeficient Right Ans - d. Wall-deficient
Which of the following types of bacteria have cell walls that contain sterols?
a. Gram-positive
b. Gram-negative
c. Acid-fast
d. Wall-deficient Right Ans - d. Wall-deficient
Which of the following types of bacteria are slow growing, due to the high
lipid content of their cell walls?
a. Gram-positive
b. Gram-negative
c. Acid-fast
d. Wall-deficient Right Ans - c. Acid-fast
Which of the following is an endotoxin, which can cause fever and
inflammation, and is associated with Gram-negative bacteria?
a. Teichoic acid
b. Periplasmic space
c. Peptidoglycan
d. Lipopolysaccharide Right Ans - d. Lipopolysaccharide
Which of the following types of bacteria have both a cell membrane and an
outer membrane?
a. Gram-positive
b. Gram-negative
, c. Acid-fast
d. Wall-deficient Right Ans - b. Gram-negative
Which of the following structures is associated with Gram-negative bacteria
and is an active area of cell metabolism?
a. Teichoic acid
b. Periplasmic space
c. Peptidoglycan
d. Lipopolysaccharide Right Ans - b. Periplasmic space
Which of the following is a function of a capsule?
a. Promotes phagocytosis
b. Protects cells from bursting
c. Allows bacteria to adhere to surfaces and each other
d. Regulates movement of water into and out of the bacterial cell Right Ans
- c. Allows bacteria to adhere to surfaces and each other
Which of the following statements about pili is false?
a. They contain adhesions, which allow the bacteria to adhere to receptors on
cells or tissues.
b. They promote chemotaxis.
c. Attachment pili increase pathogenicity of Neisseria gonorrhoeae.
d. They are involved in conjugation. Right Ans - b. They promote
chemotaxis.
Which of the following is a function of the cell membrane?
a. Promotes phagocytosis
b. Protects cells from bursting
c. Allows bacteria to adhere to surfaces and each other
d. Regulates movement of substances into and out of the bacterial cell
Right Ans - d. Regulates movement of substances into and out of the bacterial
cell
Which of the following statements is true about chemotaxis?
a. Movement towards a nutrient is an example of negative chemotaxis.
b. Movement towards light is an example of positive chemotaxis.
c. Flagella facilitate chemotaxis.
d. Pili facilitate chemotaxis. Right Ans - c. Flagella facilitate chemotaxis.
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