MICROBIOLOGY & PARASITOLOGY
1. Many of this type of bacteria do not possess superoxide dismutase and
catalase
A. obligate aerobes
B. obligate anaerobes
C. facultative anaerobes
D. microaerophiles
p. 66
2. It is the period when the bacterium is assessing the nutrients present in
medium; the bacterium does not divide but there is an intense metabolic
activity. The phase of bacterial growth is
A. Lag
B. Log
C. Stationary
D. Decline
p. 53
3. Which the best to sterilize scissors and other sharps?
A. Glutaraldehyde
B. Formaldehyde
C. Iodophor
D. Phenol
p. 60
4. These are groups of genes that are clustered together in the DNA of
some bacterial species and which may enable them to invade a host
A. Pathogenicity island
B. Episomes
C. Transposons
D. Replicons
p. 98
5. Which is true about the bacterial chromosome?
A. Contains histones that stabilize the DNA
B. Composed of a single pair of homologous chromosomes
C. Replicates in a very different manner from that of eukaryotic
chromosomes
D. Contain single copy of each gene
p. 99
6. A non-encapsulated strain of Hemophilus influenzae acquires the gene
for capsule production from a DNA extract of another encapsulated
strain. The event that has occurred is
A. Transformation
B. Conjugation
C. Transduction
D. Transcripti
,7. What is the substance primarily responsible for the structural integrity of
the bacterial cell wall and is susceptible to lysozyme?
A. Cytoplasmic membrane
B. Teichoic acid
C. Peptidoglycan
D. Lipopolysaccharide
p. 22
8. A hospitalized patient with dysuria and suprapubic pain is treated with
ciprofloxacin. What is the mechanism of action of this antibiotic?
A. It inhibits DNA-dependent RNA polymerase
B. It inhibits protein synthesis by binding to the 30S ribosomal subunit
C. It inhibits protein subunits by binding to the 50S ribosomal subunit
D. It inhibits topoisomerase II (DNA gyrase)
p. 164
9. Which bacterial structure may carry gene for antibiotic resistance?
A. Mesosome
B. Periplasm
C. Plasmid
D. Outer membrane
p. 98
10. What is the predominant indigenous flora of the colon?
A. Anaerobic, gram-negative, non-spore-forming bacteria
B. Anaerobic, gram-positive, non-spore-forming bacteria
C. Aerobic, gram-negative, non-spore-forming bacteria
D. Aerobic, gram-positive, spore-forming
bacteria p. 199
11. Which of the following is the true regarding the bacterial cell?
A. He motility of bacteria is due to flagella, axial filaments or cilia
B. The ability to colonize cell surfaces is dependent on toxic production
C. The ability to survive in soil for a long period of time is dependent
on the production of endospores
D. It has the same ribosomes as that of a eukaryotic cells
p. 35
12. Which of the following is the counterpart of mitochondria in a bacterial cell?
A. Cell wall
B. Endospores
C. Ribosomes
D. Cell membrane
p. 17
13. Which of the following agents possess either DNA or RNA?
A. Viruses
B. Prions
C. Bacteria
,14. Most pathogenic microorganism grow best at the temperature range of
about
. A. 15-20ºC
B. 30-37ºC
C. 50-60ºC
D. 80-100ºC
p. 65
15. A 22-year-old woman came in due to meningococcemia. Few hours after the
admission, the patient experienced disseminated intravascular coagulation
(DIC). The patient shock was due to what component of the causative
agent?
A. Cell wall
B. Capsule
C. Lipopolysaccharide
D. Endospore
s pp. 155-
156
16. Which one of the following antimicrobial agents acts on microorganisms
by inhibiting nucleic acid synthesis?
A. Streptomycin
B. Cefalexin
C. Ciprofloxacin
D. Erythromyc
in p. 189
17. A newborn was diagnosed with neonatal meningitis. The causative agent
was found out to be isolated in the vagina of the mother. Which one of the
following microorganisms can be a part of the normal vaginal flora of the
mother and can cause neonatal meningitis?
A. Mycoplasma pneumoniae
B. Staphylococcus aureus
C. Escherichia coli
D. Streptococcus agalactiae
p. 199
18. Which of the following is the “C3 activation unit” in the classical complement
pathway?
A. C1q
B. C3
C. C4b, C2a
D. C5, C6, C7, C8 and
C9 p. 136
19. The classic pathway of the complement system is activated when
A. The Fab portion of IgM binds to the C1s of the complement pathway
, D. The mannose binding lectin stimulates mannose associated serine
protease p. 136
1. Many of this type of bacteria do not possess superoxide dismutase and
catalase
A. obligate aerobes
B. obligate anaerobes
C. facultative anaerobes
D. microaerophiles
p. 66
2. It is the period when the bacterium is assessing the nutrients present in
medium; the bacterium does not divide but there is an intense metabolic
activity. The phase of bacterial growth is
A. Lag
B. Log
C. Stationary
D. Decline
p. 53
3. Which the best to sterilize scissors and other sharps?
A. Glutaraldehyde
B. Formaldehyde
C. Iodophor
D. Phenol
p. 60
4. These are groups of genes that are clustered together in the DNA of
some bacterial species and which may enable them to invade a host
A. Pathogenicity island
B. Episomes
C. Transposons
D. Replicons
p. 98
5. Which is true about the bacterial chromosome?
A. Contains histones that stabilize the DNA
B. Composed of a single pair of homologous chromosomes
C. Replicates in a very different manner from that of eukaryotic
chromosomes
D. Contain single copy of each gene
p. 99
6. A non-encapsulated strain of Hemophilus influenzae acquires the gene
for capsule production from a DNA extract of another encapsulated
strain. The event that has occurred is
A. Transformation
B. Conjugation
C. Transduction
D. Transcripti
,7. What is the substance primarily responsible for the structural integrity of
the bacterial cell wall and is susceptible to lysozyme?
A. Cytoplasmic membrane
B. Teichoic acid
C. Peptidoglycan
D. Lipopolysaccharide
p. 22
8. A hospitalized patient with dysuria and suprapubic pain is treated with
ciprofloxacin. What is the mechanism of action of this antibiotic?
A. It inhibits DNA-dependent RNA polymerase
B. It inhibits protein synthesis by binding to the 30S ribosomal subunit
C. It inhibits protein subunits by binding to the 50S ribosomal subunit
D. It inhibits topoisomerase II (DNA gyrase)
p. 164
9. Which bacterial structure may carry gene for antibiotic resistance?
A. Mesosome
B. Periplasm
C. Plasmid
D. Outer membrane
p. 98
10. What is the predominant indigenous flora of the colon?
A. Anaerobic, gram-negative, non-spore-forming bacteria
B. Anaerobic, gram-positive, non-spore-forming bacteria
C. Aerobic, gram-negative, non-spore-forming bacteria
D. Aerobic, gram-positive, spore-forming
bacteria p. 199
11. Which of the following is the true regarding the bacterial cell?
A. He motility of bacteria is due to flagella, axial filaments or cilia
B. The ability to colonize cell surfaces is dependent on toxic production
C. The ability to survive in soil for a long period of time is dependent
on the production of endospores
D. It has the same ribosomes as that of a eukaryotic cells
p. 35
12. Which of the following is the counterpart of mitochondria in a bacterial cell?
A. Cell wall
B. Endospores
C. Ribosomes
D. Cell membrane
p. 17
13. Which of the following agents possess either DNA or RNA?
A. Viruses
B. Prions
C. Bacteria
,14. Most pathogenic microorganism grow best at the temperature range of
about
. A. 15-20ºC
B. 30-37ºC
C. 50-60ºC
D. 80-100ºC
p. 65
15. A 22-year-old woman came in due to meningococcemia. Few hours after the
admission, the patient experienced disseminated intravascular coagulation
(DIC). The patient shock was due to what component of the causative
agent?
A. Cell wall
B. Capsule
C. Lipopolysaccharide
D. Endospore
s pp. 155-
156
16. Which one of the following antimicrobial agents acts on microorganisms
by inhibiting nucleic acid synthesis?
A. Streptomycin
B. Cefalexin
C. Ciprofloxacin
D. Erythromyc
in p. 189
17. A newborn was diagnosed with neonatal meningitis. The causative agent
was found out to be isolated in the vagina of the mother. Which one of the
following microorganisms can be a part of the normal vaginal flora of the
mother and can cause neonatal meningitis?
A. Mycoplasma pneumoniae
B. Staphylococcus aureus
C. Escherichia coli
D. Streptococcus agalactiae
p. 199
18. Which of the following is the “C3 activation unit” in the classical complement
pathway?
A. C1q
B. C3
C. C4b, C2a
D. C5, C6, C7, C8 and
C9 p. 136
19. The classic pathway of the complement system is activated when
A. The Fab portion of IgM binds to the C1s of the complement pathway
, D. The mannose binding lectin stimulates mannose associated serine
protease p. 136
