BIOL 2051 EXAM 3 QUESTIONS AND ANSWERS
Rabies disease is a ____ (pick only one answer)
A. Slowly progressing zoonotic viral disease, with main reservoir being wild animals, such as skunks,
raccoons
B. No treatment for rabies is currently available
C. Caused by an anaerobic endospore forming rod shaped bacterium, and a fecal oral transmission route
D. Fast-progressing, first symptoms in 1 hr after exposure, death within 3 days
E. Airborne transmission (via inhalation of spores) - CORRECT ANSWER✅✅A
What is NOT a diseased caused by Staphylococcus aureus?
A. Necrotizing fascitis
B. Osteomyelitis
C. Scalded skin syndrome
D. Toxic shock syndrome
E. Impetigo - CORRECT ANSWER✅✅A
The metabolic process of nitrogen reduction...
A. Is a reaction catalyzed by the denitrogenase and it converts nitrogen gas into ammonia
B. Converts ammonia into nitrate
C. Converts nitrogen gas into nitrate
D. Converts nitrate into gold
E. Converts nitrogen gas into amino acid - CORRECT ANSWER✅✅A and E
Match symptoms to the disease
,A disease characterized with black lesions with surrounding edema (swelling) - CORRECT
ANSWER✅✅Cutaneous anthrax
Match symptoms to the disease
Severe deep tissue infection leading to necrosis and accumulation of toxic products, caused by the
anaerobic rod, sometimes requiring amputation - CORRECT ANSWER✅✅Gas gangrene
This disease starts as a "lockjaw" due to bacterial exotoxin blocking inhibitions of muscle contraction
(muscles contract uncontrollably, resulting in a rigid paralysis) - CORRECT ANSWER✅✅Tetanus
Impetigo, a superficial bacterial infection that causes skin to flake or peel off can be caused by...
A. Either Staphylococcus aureus or streptococcus progenes
B. Measels and zika virus
C. Staphyloccous aureus
D. Neither Staphylococcus aureus and Streptococcus pyogenes
E. Streptococcus pyogenes - CORRECT ANSWER✅✅A
Which of the follow is NOT a nucleic acid based method of identification?
A. DNA microarray
B. Rapid test (immunochromatography)
C. RT-PCR
D. FISH (fluorescent in situ hybridization) - CORRECT ANSWER✅✅B
True or False: DNA methods alone (PCR, and sequencing) are not enough to diagnose pathogens: the
golden standard of any pathogen's duagostic has to be performed (or at least attempted): to isolate a
pathogen in a pure culture with the use of differential/selective medium. - CORRECT ANSWER✅✅True
, What is the major product of organic matter decomposition in anaerobic environment?
A. CH4, methane
B. O2
C. FeS (pyrite)
D. CO2
E. CaCO3 (calcium carbonate) - CORRECT ANSWER✅✅A
Some of the most common nosocomial infections are caused by fungal pathogens like candida etc. (a
type of yeast). Which would be an antimicrobial agent of choice?
A. A reverse transcriptase inhibitor
B. A flagella inhibitor
C: A bacterial protein synthesis inhibitor like aminoglyside
D. An drug that interferes with ergosterol synthesis
E. A neuraminidase inhibitor - CORRECT ANSWER✅✅D
Mannitol salt agar is medium of choice for the isolation of
A. Staphylococcus aureus
B.Streptococcus pyogenes
C. Mycobacterium tuberculosum
D. Neisseria sp.
E. Flu virus - CORRECT ANSWER✅✅A
___ medium allows only a NARROW group of microbes, and is made with the use of an inhibitory
component
A. Enriched
Rabies disease is a ____ (pick only one answer)
A. Slowly progressing zoonotic viral disease, with main reservoir being wild animals, such as skunks,
raccoons
B. No treatment for rabies is currently available
C. Caused by an anaerobic endospore forming rod shaped bacterium, and a fecal oral transmission route
D. Fast-progressing, first symptoms in 1 hr after exposure, death within 3 days
E. Airborne transmission (via inhalation of spores) - CORRECT ANSWER✅✅A
What is NOT a diseased caused by Staphylococcus aureus?
A. Necrotizing fascitis
B. Osteomyelitis
C. Scalded skin syndrome
D. Toxic shock syndrome
E. Impetigo - CORRECT ANSWER✅✅A
The metabolic process of nitrogen reduction...
A. Is a reaction catalyzed by the denitrogenase and it converts nitrogen gas into ammonia
B. Converts ammonia into nitrate
C. Converts nitrogen gas into nitrate
D. Converts nitrate into gold
E. Converts nitrogen gas into amino acid - CORRECT ANSWER✅✅A and E
Match symptoms to the disease
,A disease characterized with black lesions with surrounding edema (swelling) - CORRECT
ANSWER✅✅Cutaneous anthrax
Match symptoms to the disease
Severe deep tissue infection leading to necrosis and accumulation of toxic products, caused by the
anaerobic rod, sometimes requiring amputation - CORRECT ANSWER✅✅Gas gangrene
This disease starts as a "lockjaw" due to bacterial exotoxin blocking inhibitions of muscle contraction
(muscles contract uncontrollably, resulting in a rigid paralysis) - CORRECT ANSWER✅✅Tetanus
Impetigo, a superficial bacterial infection that causes skin to flake or peel off can be caused by...
A. Either Staphylococcus aureus or streptococcus progenes
B. Measels and zika virus
C. Staphyloccous aureus
D. Neither Staphylococcus aureus and Streptococcus pyogenes
E. Streptococcus pyogenes - CORRECT ANSWER✅✅A
Which of the follow is NOT a nucleic acid based method of identification?
A. DNA microarray
B. Rapid test (immunochromatography)
C. RT-PCR
D. FISH (fluorescent in situ hybridization) - CORRECT ANSWER✅✅B
True or False: DNA methods alone (PCR, and sequencing) are not enough to diagnose pathogens: the
golden standard of any pathogen's duagostic has to be performed (or at least attempted): to isolate a
pathogen in a pure culture with the use of differential/selective medium. - CORRECT ANSWER✅✅True
, What is the major product of organic matter decomposition in anaerobic environment?
A. CH4, methane
B. O2
C. FeS (pyrite)
D. CO2
E. CaCO3 (calcium carbonate) - CORRECT ANSWER✅✅A
Some of the most common nosocomial infections are caused by fungal pathogens like candida etc. (a
type of yeast). Which would be an antimicrobial agent of choice?
A. A reverse transcriptase inhibitor
B. A flagella inhibitor
C: A bacterial protein synthesis inhibitor like aminoglyside
D. An drug that interferes with ergosterol synthesis
E. A neuraminidase inhibitor - CORRECT ANSWER✅✅D
Mannitol salt agar is medium of choice for the isolation of
A. Staphylococcus aureus
B.Streptococcus pyogenes
C. Mycobacterium tuberculosum
D. Neisseria sp.
E. Flu virus - CORRECT ANSWER✅✅A
___ medium allows only a NARROW group of microbes, and is made with the use of an inhibitory
component
A. Enriched
