Microbiology 020 - General Microbiology » Spring 2021 » Chapter 3 Quiz

Need help with your exam preparation?

Existing Quiz Clients Login here
Question #1
Gram-negative bacteria
A.   encompass all pathogens.
B.   are less susceptible to antibiotics that target peptidoglycan than gram-positive organisms.
C.   None of the choices is correct.
D.   are more susceptible to antibiotics that target peptidoglycan than gram-positive organisms.
E.   stain purple in the Gram stain.
F.     
Question #2
All bacterial cells have ________.
A.   one or more fimbriae
B.   one or more chromosomes
C.   capsules
D.   flagella
E.   the ability to produce endospores
Question #3
The outcome of the Gram stain is based on differences in the cell's _____.
A.     
B.   wall
C.   flagella
D.   inclusions
E.   membrane
F.   ribosomes
Question #4
The difference in cell wall structure of Mycobacterium and Nocardia compared to the typical gram-positive bacterial cell wall structure is that they ________.
A.   contain more peptidoglycan
B.   are easily decolorized
C.   All of the choices are correct.
D.   contain lipopolysaccharide
E.   have a predominance of unique, waxy lipids
Question #5
Which order below reflects the correct procedure for Gram staining?
A.   Crystal violet–iodine–alcohol/acetone–safranin
B.   Iodine–safranin–crystal violet–alcohol/acetone
C.   Crystal violet–alcohol/acetone–iodine–safranin
D.   Alcohol/acetone–crystal violet–safranin–iodine
Question #6
Which statement below supports the argument that gram-negative cells are structurally weaker than gram-positive cells?
A.   Gram-negative cells contain lipopolysaccharides, the lipid component of which acts as an endotoxin.
B.   Gram-positive cells contain teichoic acids, whereas gram-negative cells lack teichoic acids in their cell wall.
C.   The envelope of gram-negative cells comprises a hydrophobic outer membrane.
D.   Gram-negative cells have a thinner layer of peptidoglycan in their cell wall compared to gram-positive cells.
Question #7
Halobacterium salinarium lives in and requires salt. This is an example of an archaeabacterium described as a(n) _______.
A.   osmophile
B.   thermophile
C.   psychrophile
D.   halophile
E.   methanogen
Question #8
Bacterial cells could have any of the following appendages except _____.
A.   sex pili
B.   flagella
C.   cilia
D.   pili
Question #9
Plasmids ________.
A.   are essential for growth and metabolism
B.   are found in all bacteria
C.   cannot be passed on to progeny
D.   are often the site of pathogenic genes
Question #10
If you looked at a _______ under the microscope, you would likely see an irregular cluster of spherical cells.
A.   diplococcus
B.   staphylococcus
C.   streptococcus
D.   sarcina
E.   palisade
Question #11
The transfer of genes during bacterial conjugation involves rigid, tubular appendages called _____.
A.   flagella
B.   sex pili
C.   fimbriae
D.   cilia
E.   periplasmic flagella (axial filaments)

Need help with your exam preparation?

Existing Quiz Clients Login here