MICROBIOLOGY EXAM 3 PRACTICE QUESTIONS AND
ANSWERS
The most common sexually transmitted disease in the US is:
A. Herpes
B. Syphilis
C. Condyloma
D. Chlamydiae infections
E. Gonorrhoea infections - Answers - D
An enzyme of Staphylococcus aureus that convents fibrinogen into insoluble fibirn is:
A. Lipase
B. Coagulase
C. Staphylokinase
D. Hemolycin
E. Hyaluronidase - Answers - B
Extra-intestinal disease, especially the production of a serious fever, may follow
intestinal infection with:
A. Vibrio cholerae
B. Salmonella typhi
C. Shigella dysenteriae
D. Clostridium botulinum
E. Staphylococcus aureus - Answers - B
On blood agar, Streptococcus pyogenes causes which type of hemolysis?
A. Delta hemolysis
B. Alpha hemolysis
C. Gamma hemolysis
D.Beta hemolysis
E. No hemolysis - Answers - D
,S. pyogenes has:
A. capsule
B. M protein
C. Teichoic acid
D. All of these - Answers - D
Food poisoning due to which organism is most likely to cause a flaccid muscle
paralysis:
A. Staphylococcus aureus
B. Clostridium perfringens
C. Clostridium botulinum
D. Bacillus anthracis
E. Bacillus cereus - Answers - C
(think Botox!)
Pneumococcal pneumonia is often treated successfully by using penicillin. Penicillin
inhibits the growth of the pneumococcus by preventing the synthesis of:
A. Capsule
B. Common pili
C. Cell wall
D. Cell membrane
E. Flagella - Answers - C
Which of the following may be complications associated with infections of Neisseria
gonorrhoeae?
A. Pelvic inflammatory disease
B. Infections of the skin
C. Infections of the joints that may lead to arthritis
D. Disseminated gonococcal infection
,E. All of these - Answers - E
Chlamydia can cause eye disease
True
False - Answers - True
Which of the following diseases is (are) caused by Enterobacteriaceae?
A. urinary tract infection
B. enteric fever
C. septicemia
D. gastroenteritis
E. All of these - Answers - E
Infection of brain is called:
A. Erysipelas
B. Meningitis
C. Tuberculosis
D. Encephalitis
E. Impetigo - Answers - D
The material that is released from bacteria that may lead to shock and death in
septicemia:
A. Components of Gram-negative outer membrane
B. exotoxin
C. Teichoic acid
D. Protein A - Answers - A
Edema factor and lethal factors are two characteristics of:
A.Neisseria gonorrheae
B. Treponema pallidium
, C. Chlamidiae tracomitis
D. Bacillus anthracis
E. Staphylococcus aureus - Answers - D
Gas gangrene is the result of deep wound infections in anaerobic tissue by Clostridium
perfringens.
A. Release of superantigens in the area
B. Release of endotoxins by Clostridium
C. Sporulation of Clostridium
D. Phagocytosis
E. Loss of blood supply to the soft tissues - Answers - E
Lipopolysaccharide is present in the outer membrane of gram negative bacteria. Which
of the following does not apply to this?
A. It prevents phagocytosis
B. It promotes degranulation of PMN leukoccytes
C. It activates complement fixation
D. It has antigenic properties
E. It produces fever - Answers - A
Gram negative bacteria are usually more resistant to antibiotics than Gram positive
bacteria.
True
False - Answers - True
Both antibiotic treatment and surgical removal are required to treat infections such as:
A=Gangrene
B=Flesh-eating bacteria
C=Tuberculosis
D=Gonhorrhea infection
A. A and D
ANSWERS
The most common sexually transmitted disease in the US is:
A. Herpes
B. Syphilis
C. Condyloma
D. Chlamydiae infections
E. Gonorrhoea infections - Answers - D
An enzyme of Staphylococcus aureus that convents fibrinogen into insoluble fibirn is:
A. Lipase
B. Coagulase
C. Staphylokinase
D. Hemolycin
E. Hyaluronidase - Answers - B
Extra-intestinal disease, especially the production of a serious fever, may follow
intestinal infection with:
A. Vibrio cholerae
B. Salmonella typhi
C. Shigella dysenteriae
D. Clostridium botulinum
E. Staphylococcus aureus - Answers - B
On blood agar, Streptococcus pyogenes causes which type of hemolysis?
A. Delta hemolysis
B. Alpha hemolysis
C. Gamma hemolysis
D.Beta hemolysis
E. No hemolysis - Answers - D
,S. pyogenes has:
A. capsule
B. M protein
C. Teichoic acid
D. All of these - Answers - D
Food poisoning due to which organism is most likely to cause a flaccid muscle
paralysis:
A. Staphylococcus aureus
B. Clostridium perfringens
C. Clostridium botulinum
D. Bacillus anthracis
E. Bacillus cereus - Answers - C
(think Botox!)
Pneumococcal pneumonia is often treated successfully by using penicillin. Penicillin
inhibits the growth of the pneumococcus by preventing the synthesis of:
A. Capsule
B. Common pili
C. Cell wall
D. Cell membrane
E. Flagella - Answers - C
Which of the following may be complications associated with infections of Neisseria
gonorrhoeae?
A. Pelvic inflammatory disease
B. Infections of the skin
C. Infections of the joints that may lead to arthritis
D. Disseminated gonococcal infection
,E. All of these - Answers - E
Chlamydia can cause eye disease
True
False - Answers - True
Which of the following diseases is (are) caused by Enterobacteriaceae?
A. urinary tract infection
B. enteric fever
C. septicemia
D. gastroenteritis
E. All of these - Answers - E
Infection of brain is called:
A. Erysipelas
B. Meningitis
C. Tuberculosis
D. Encephalitis
E. Impetigo - Answers - D
The material that is released from bacteria that may lead to shock and death in
septicemia:
A. Components of Gram-negative outer membrane
B. exotoxin
C. Teichoic acid
D. Protein A - Answers - A
Edema factor and lethal factors are two characteristics of:
A.Neisseria gonorrheae
B. Treponema pallidium
, C. Chlamidiae tracomitis
D. Bacillus anthracis
E. Staphylococcus aureus - Answers - D
Gas gangrene is the result of deep wound infections in anaerobic tissue by Clostridium
perfringens.
A. Release of superantigens in the area
B. Release of endotoxins by Clostridium
C. Sporulation of Clostridium
D. Phagocytosis
E. Loss of blood supply to the soft tissues - Answers - E
Lipopolysaccharide is present in the outer membrane of gram negative bacteria. Which
of the following does not apply to this?
A. It prevents phagocytosis
B. It promotes degranulation of PMN leukoccytes
C. It activates complement fixation
D. It has antigenic properties
E. It produces fever - Answers - A
Gram negative bacteria are usually more resistant to antibiotics than Gram positive
bacteria.
True
False - Answers - True
Both antibiotic treatment and surgical removal are required to treat infections such as:
A=Gangrene
B=Flesh-eating bacteria
C=Tuberculosis
D=Gonhorrhea infection
A. A and D
