GCU BIO 319: LATEST A+ QUESTIONS AND ANSWERS
GUIDE FOR ULTIMATE SUCCESS
1) Pathogenicity is the ability
A) of the host to inflict damage on the pathogen.
B) of the host to resist damage by the pathogen.
C) of the pathogen to inflict damage on the host.
D) None of these are correct.
C) of the pathogen to inflict damage on the host
2) Which of the following is NOT a subunit of lipopolysaccharide (LPS)?
A) O-specific polysaccharide
B) lipid A
C) core polysaccharide
D) M protein
D) M protein
3) One microenvironment of the skin is an area where glands produce an oily substance called
A) mucus.
B) sebum.
C) fimbrae.
D) lipid A
B) sebum.
4) Following antibiotic therapy, patients are often administered ________ to facilitate recolonizaton
of normal flora.
A) fluoride
B) iron
C) probiotics
D) antivirals
C) probiotics
5) Decalcification of the tooth enamel due to the production of high concentrations of organic acids in
the mouth is known as
A) degenerative plaque.
B) dental caries.
C) dental plaque.
D) microbial enamel decalcification
D) microbial enamel decalcification
6) The following bacterial species are all implicated in dental caries EXCEPT
A) Fusobacterium.
B) Borrelia.
, C) Streptococcus.
D) Lactobacillus.
D) Lactobacillus.
7) Which of these microorganisms is MOST likely to be found in the human gut?
A) Helicobacter pylori
B) Streptococcus sobrinus
C) Streptococcus mutans
D) Roseobacter denitrificans
A) Helicobacter pylori
8) Normal flora in the duodenum are
A) similar to the microflora in the stomach.
B) dominated by aerobic organisms.
C) tolerant to alkaline environments.
D) tolerant to high salinity.
A) similar to the microflora in the stomach.
9) Which of the following are NOT found in the gastrointestinal tract of healthy humans?
A) Bacteroides
B) Clostridium
C) Escherichia coli
D) protists
D) protists
10) The following compounds are all produced by intestinal microflora EXCEPT
A) flatus.
B) vitamin C.
C) vitamin B12.
D) vitamin K.
B) vitamin C.
11) Staphylococcus aureus produces ________, leading to fibrin clots that protect them from attack by
host cells.
A) collagenase
B) coagulase
C) lipase
D) amylase
B) coagulase
12) Only particles smaller than ________ µm in diameter reach the lungs.
A) 10
B) 20
GUIDE FOR ULTIMATE SUCCESS
1) Pathogenicity is the ability
A) of the host to inflict damage on the pathogen.
B) of the host to resist damage by the pathogen.
C) of the pathogen to inflict damage on the host.
D) None of these are correct.
C) of the pathogen to inflict damage on the host
2) Which of the following is NOT a subunit of lipopolysaccharide (LPS)?
A) O-specific polysaccharide
B) lipid A
C) core polysaccharide
D) M protein
D) M protein
3) One microenvironment of the skin is an area where glands produce an oily substance called
A) mucus.
B) sebum.
C) fimbrae.
D) lipid A
B) sebum.
4) Following antibiotic therapy, patients are often administered ________ to facilitate recolonizaton
of normal flora.
A) fluoride
B) iron
C) probiotics
D) antivirals
C) probiotics
5) Decalcification of the tooth enamel due to the production of high concentrations of organic acids in
the mouth is known as
A) degenerative plaque.
B) dental caries.
C) dental plaque.
D) microbial enamel decalcification
D) microbial enamel decalcification
6) The following bacterial species are all implicated in dental caries EXCEPT
A) Fusobacterium.
B) Borrelia.
, C) Streptococcus.
D) Lactobacillus.
D) Lactobacillus.
7) Which of these microorganisms is MOST likely to be found in the human gut?
A) Helicobacter pylori
B) Streptococcus sobrinus
C) Streptococcus mutans
D) Roseobacter denitrificans
A) Helicobacter pylori
8) Normal flora in the duodenum are
A) similar to the microflora in the stomach.
B) dominated by aerobic organisms.
C) tolerant to alkaline environments.
D) tolerant to high salinity.
A) similar to the microflora in the stomach.
9) Which of the following are NOT found in the gastrointestinal tract of healthy humans?
A) Bacteroides
B) Clostridium
C) Escherichia coli
D) protists
D) protists
10) The following compounds are all produced by intestinal microflora EXCEPT
A) flatus.
B) vitamin C.
C) vitamin B12.
D) vitamin K.
B) vitamin C.
11) Staphylococcus aureus produces ________, leading to fibrin clots that protect them from attack by
host cells.
A) collagenase
B) coagulase
C) lipase
D) amylase
B) coagulase
12) Only particles smaller than ________ µm in diameter reach the lungs.
A) 10
B) 20
