Medical Microbiology Test Bank
Chapter 1: General Microbiology
MCQs:
1.
Which of the following is NOT a prokaryotic microorganism?
a) Bacteria
b) Archaea
c) Viruses
d) Mycoplasma
2.
1. Answer: c) Viruses
3.
Gram-positive bacteria stain _______________ because they have a thick
_______________ layer.
a) Red; lipopolysaccharide
b) Purple; peptidoglycan
c) Green; protein
d) Blue; lipid
4.
1. Answer: b) Purple; peptidoglycan
5.
The structure that allows bacteria to adhere to surfaces and evade host
defenses is the:
a) Flagella
b) Capsule
c) Pilus
d) Cell membrane
6.
1. Answer: b) Capsule
True/False:
1. Endotoxins are components of the outer membrane of Gram-negative bacteria.
(True)
2. Bacterial spores are highly resistant to heat and disinfectants. (True)
Short Answer:
, Describe the differences between Gram-positive and Gram-negative bacterial
cell walls.
Chapter 2: Bacteriology
MCQs:
1.
Staphylococcus aureus can be differentiated from other Staphylococcus
species by its ability to:
a) Ferment lactose
b) Produce catalase
c) Produce coagulase
d) Form spores
2.
o Answer: c) Produce coagulase
3.
Mycobacterium tuberculosis is best identified using which staining technique?
a) Gram stain
b) India ink
c) Acid-fast stain
d) Giemsa stain
4.
o Answer: c) Acid-fast stain
5.
A patient with food poisoning after eating reheated rice is likely infected with:
a) Clostridium botulinum
b) Bacillus cereus
c) Staphylococcus aureus
d) Escherichia coli
6.
o Answer: b) Bacillus cereus
True/False:
1. Clostridium tetani produces a neurotoxin that causes flaccid paralysis. (False,
it causes spastic paralysis.)
Chapter 1: General Microbiology
MCQs:
1.
Which of the following is NOT a prokaryotic microorganism?
a) Bacteria
b) Archaea
c) Viruses
d) Mycoplasma
2.
1. Answer: c) Viruses
3.
Gram-positive bacteria stain _______________ because they have a thick
_______________ layer.
a) Red; lipopolysaccharide
b) Purple; peptidoglycan
c) Green; protein
d) Blue; lipid
4.
1. Answer: b) Purple; peptidoglycan
5.
The structure that allows bacteria to adhere to surfaces and evade host
defenses is the:
a) Flagella
b) Capsule
c) Pilus
d) Cell membrane
6.
1. Answer: b) Capsule
True/False:
1. Endotoxins are components of the outer membrane of Gram-negative bacteria.
(True)
2. Bacterial spores are highly resistant to heat and disinfectants. (True)
Short Answer:
, Describe the differences between Gram-positive and Gram-negative bacterial
cell walls.
Chapter 2: Bacteriology
MCQs:
1.
Staphylococcus aureus can be differentiated from other Staphylococcus
species by its ability to:
a) Ferment lactose
b) Produce catalase
c) Produce coagulase
d) Form spores
2.
o Answer: c) Produce coagulase
3.
Mycobacterium tuberculosis is best identified using which staining technique?
a) Gram stain
b) India ink
c) Acid-fast stain
d) Giemsa stain
4.
o Answer: c) Acid-fast stain
5.
A patient with food poisoning after eating reheated rice is likely infected with:
a) Clostridium botulinum
b) Bacillus cereus
c) Staphylococcus aureus
d) Escherichia coli
6.
o Answer: b) Bacillus cereus
True/False:
1. Clostridium tetani produces a neurotoxin that causes flaccid paralysis. (False,
it causes spastic paralysis.)
