MICROBIOLOGY 3 EXAM QUESTIONS WITH
CORRECT ANSWERS 2025/2026
______ can be used on skin before drawing blood
Disinfectants
Bleach
Antiseptics
Lysol
QUATS - CORRECT ANSWER -Antiseptics
All gram negative bacteria contain _______ within their cells walls
Neurotoxins
Exotoxins
Endotoxins
Mycolic acids
Perfume - CORRECT ANSWER -Endotoxins
Which of the following is NOT a gram negative bacterium?
Vibrio vulnificus
Yersinia pestis
Mycobacterium leprae
Bordetella pertussis
Neisseria gonorrhoeae - CORRECT ANSWER -Mycobacterium leprae
,Which of the following bacteria contain mycolic acids in its cell wall?
Treponema pallidum
Staphylococcus aureus
Mycobacterium avium
Mycobacterium tuberculosis
Both C and D - CORRECT ANSWER -Both C and D
What is the incubation period for Mycobacterium leprae?
1-2 days
1-2 weeks
1-2 months
6-12 months
2 or more years - CORRECT ANSWER -2 or more years
How does one acquire the plague?
Through a bite by a flea with Yersinia pestis
By eating contaminated shellfish
Sexual transmission
Through the bite of a rodent infected with Yersinia pestis
Through the bite of a flea infected with Helicobacter pylori - CORRECT ANSWER -Through a bite
by a flea with Yersinia pestis
, Frontline: Hunting Nightmare Bacteria: which of the following gram negative bacteria cause a
secondary bacterial infection in Addie Rerecich?
Staphylococcus aureus
Salmonella agbeni
Stenotrophomonas spp
Pseudomonas aeruginosa
Acinetobacter baumannii - CORRECT ANSWER -Stenotrophomonas spp
Anthrax: which of the following forms of anthrax killed humans in the largest anthrax outbreak?
Cutaneous
Inhalational
Gastrointestinal
Sexual
Septic - CORRECT ANSWER -Inhalational
NOVA: The Most Dangerous Woman in America: What other sources of Salmonella typhi were
eliminated as a source or reservoir of this bacterium during investigation health experts?
Plumbing was eliminated by putting dye into the toilet
Ruled out shellfish
Examined milk supply which was not contaminated
All of the above were ruled out
None of the above were ruled out - CORRECT ANSWER -All of the above were ruled out
Which of the following is NOT a characteristic of a pathogenic bacterium?
CORRECT ANSWERS 2025/2026
______ can be used on skin before drawing blood
Disinfectants
Bleach
Antiseptics
Lysol
QUATS - CORRECT ANSWER -Antiseptics
All gram negative bacteria contain _______ within their cells walls
Neurotoxins
Exotoxins
Endotoxins
Mycolic acids
Perfume - CORRECT ANSWER -Endotoxins
Which of the following is NOT a gram negative bacterium?
Vibrio vulnificus
Yersinia pestis
Mycobacterium leprae
Bordetella pertussis
Neisseria gonorrhoeae - CORRECT ANSWER -Mycobacterium leprae
,Which of the following bacteria contain mycolic acids in its cell wall?
Treponema pallidum
Staphylococcus aureus
Mycobacterium avium
Mycobacterium tuberculosis
Both C and D - CORRECT ANSWER -Both C and D
What is the incubation period for Mycobacterium leprae?
1-2 days
1-2 weeks
1-2 months
6-12 months
2 or more years - CORRECT ANSWER -2 or more years
How does one acquire the plague?
Through a bite by a flea with Yersinia pestis
By eating contaminated shellfish
Sexual transmission
Through the bite of a rodent infected with Yersinia pestis
Through the bite of a flea infected with Helicobacter pylori - CORRECT ANSWER -Through a bite
by a flea with Yersinia pestis
, Frontline: Hunting Nightmare Bacteria: which of the following gram negative bacteria cause a
secondary bacterial infection in Addie Rerecich?
Staphylococcus aureus
Salmonella agbeni
Stenotrophomonas spp
Pseudomonas aeruginosa
Acinetobacter baumannii - CORRECT ANSWER -Stenotrophomonas spp
Anthrax: which of the following forms of anthrax killed humans in the largest anthrax outbreak?
Cutaneous
Inhalational
Gastrointestinal
Sexual
Septic - CORRECT ANSWER -Inhalational
NOVA: The Most Dangerous Woman in America: What other sources of Salmonella typhi were
eliminated as a source or reservoir of this bacterium during investigation health experts?
Plumbing was eliminated by putting dye into the toilet
Ruled out shellfish
Examined milk supply which was not contaminated
All of the above were ruled out
None of the above were ruled out - CORRECT ANSWER -All of the above were ruled out
Which of the following is NOT a characteristic of a pathogenic bacterium?
