Bacteria 101
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This quiz should give you a general idea about bacterial morphology and structure.
- 1.Which of the following is essential to bacteria because they lack compartmentalization?
- A.
Small surface-to-volume ratio
- B.
Large surface-to-volume ratio
- C.
Large size
- D.
Large volume-to-surface ratio
- 2.Which of the following refers to a wavy shape?
- A.
Pleomorphic
- B.
Coccus
- C.
Vibrio
- D.
Spirochete
- E.
Spirillum
- 3.Which of the following refers to a short rod?
- A.
Coccus
- B.
Bacillus
- C.
Vibrio
- D.
Coccobacillus
- E.
Spirillum
- 4.Which of the following would refer to a "grapelike cluster"?
- A.
Strepto-
- B.
Sarcina
- C.
Staphylo-
- D.
Tetrads
- E.
Diplo-
- 5.Most bacterial cell membranes contain sterols.
- A.
True
- B.
False
- 6.Which of the following is not a function of the cell wall?
- A.
Holds genetic information
- B.
Maintenance of cell shape
- C.
Prevention of osmotic lysis
- D.
Anchor for external structures
- E.
Provide environmental protection
- 7.Which of the following does a bacterial cell wall contain?
- A.
Chitin
- B.
Peptidoglycan
- C.
Cellulose
- D.
Erogosterol
- E.
Mannan
- 8.Which of the following are NOT found in Gram Negative bacteria?
- A.
Lipopolysaccharide
- B.
O antigen
- C.
Trimeric Porins
- D.
Lipid A
- E.
H antigen
- 9.Gram Positive bacteria contain Lipid A that contains toxins that may cause septic shock in a host.
- A.
True
- B.
False
- 10.What structure in Gram Negative bacteria serves as a stabilizer for the outer membrane?
- A.
Teichoic Acid
- B.
Mycolic Acid
- C.
Lipoprotein
- D.
Lipopolysaccharide
- E.
Periplasmic Space
- 11.Gram Positive bacteria does NOT contain which of the following?
- A.
Peptidoglycan
- B.
Teichoic Acid
- C.
Lipid A
- D.
Lipoteichoic Acid
- 12.What stain is used for acid fast bacteria? May choose more than one.
- A.
Ziehl-Neehlson Stain
- B.
Gram Stain
- C.
Carbol fuchsin dye
- D.
Methylene Blue
- E.
PAS
- 13.Which of the following is NOT an acid fast bacteria?
- A.
E. Coli
- B.
Mycobacterium tuberculosis
- C.
Nocardia asteroides
- D.
M. leprae
- 14.The A antigen in flagellum is used in typing bacterial isolates.
- A.
True
- B.
False
- 15.Davy is looking at some bacteria under the microscope and he notices that it has 3 flagella at one end that are helping it to swim across the viewing area. This bacteria would be classified as?
- A.
Peritrichous
- B.
Amphitrichous
- C.
Lophotrichous
- D.
Monotrichous
- E.
Ciliated
- 16.The same bacteria Davy found is swimming toward food. What word below describes his movement?
- A.
Chemotaxis
- B.
Twitching
- C.
Chemotoxicity
- D.
Phototrophic
- 17.Which of the following is NOT a function of pili?
- A.
Bind to sugars using lectins
- B.
Twitching
- C.
Secreted slime layer
- D.
Adhesion to a host cell
- E.
Exchanging DNA
- 18.A capsule or slime layer (glycocalyx) makes a bacteria less virulent.
- A.
True
- B.
False
- 19.Which of the following allows you to detect the presence of a capsule when S. pneumoniae is suspected?
- A.
Quahog reaction
- B.
Quellung reaction
- C.
Acid fast reaction
- D.
Gram Staining
- 20.Which of the following is NOT true of bacterial ribosomes?
- A.
Contain 70S ribosome
- B.
Contain 30S subunit
- C.
Contain 40S subunit
- D.
Contain 50S subunit
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