parasitology exam 1 practice questions
and answers
Which of the following statements best describes the process called phagocytosis?
- It requires the rearrangement of clathrin
- Small molecules are usually internalized in this manner
- It is a process performed by specialized cells for the internalization of particles
greater than 0.5um
- All receptors can mediate this process✔✔It is a process performed by specialized
cells for the internalization of particles greater than 0.5um
Which of the following is true:
- Phagosomes are the primary site of protein synthesis in a cell
- Energy metabolism of the cell takes place in the phagosome
- Phagosomes never fuse with lysosomes
- Large internalized particles are directed to phagosomes✔✔Large internalized
particles are directed to phagosomes
Which of the following is not a function of the cell cytoskeleton:
- Provide structural support to maintain cell shape
- Is the force generating apparatus that enables cell mobility and contractility
- It is important for cell-cell recognition
- It contains the machinery that moves organelles within the cell✔✔It is important for
cell-cell recognition
When cells are activated, they can:
- release substances called cytokines
- change their cytoskeletal organization
- change ion permeability
- all of the above✔✔all of the above
Eukaryotic cells differ from prokaryotes in that:
- Their DNA is enclosed in an organelle called a nucleus
- All eukaryotic cells have a mitochondrion
- ATP is generated from the consumption of glucose in Eukaryotes
- All of the above are true
- none of the above is true✔✔Their DNA is enclosed in an organelle called a nucleus
Which of the following is not a component of the innate immune system:
- skin
- complement
- T cells
- linings of internal tracts
,- secretions✔✔T cells
The characteristics of the adaptive immune response are:
1 specificity to the infectious agent
2 the magnitude of the response increases with each encounter
3 T cells and B cells participate in the response
4 1 and 3 are correct
5 1,2 and 3 are correct✔✔1, 2 and 3 are correct
An immunogen that is going to be used for vaccination against Naegleria has been
sitting out in the sun. It is quite likely that it has become denatured. The authorities
want
to know how this might affect the efficacy of the vaccine. You say:
- Neither the T cell response nor the antibody response will be affected
- T cells generated with this denatured immunogen will not respond to the native
Naegleria molecule
- Antibodies cannot be generated to Naegleria molecules
- Antibodies generated to this denatured immunogen will not bind to the native
molecule
on Naegleria
- None of the above is correct.✔✔Antibodies generated to this denatured
immunogen will not bind to the native molecule
on Naegleria
MHC class II molecules are expressed by
A) B cells; B) Erythrocytes. C) Macrophages D) Hepatocytes.
-A
- A and C
- B and D
- A,B,C, and D✔✔- A and C
Two patients were suspected of exposure to a rare parasite. When sera from these
patients were analyzed, patient A had mostly IgM antibodies to the infectious agent
while
patient B had a very high titer of mostly IgG. What can you conclude from these
results?
- Patient A is resistant to the infection
- Patient B has been infected with the parasite for a long time or has been infected
multiple times
- Patient B might have been infected very recently by the parasite
- Some antibodies in patient A's serum might have become degraded
- Niether patient has been exposed to the parasite✔✔Patient B has been infected
with the parasite for a long time or has been infected
multiple times
The strutures in eukaroytic cells that contains 9 pairs of microtubules in the
, periphery and a pair of microtubules in the center are called:
- lysosme
- phagosome
- costa
- parabasal body
- Cilia✔✔Cilia
The motor force for flagellum movement is generated by ----- around the pairs of
microtubules.
- Costa
- actin
- dyenin heads
- intermediate filaments✔✔dyenin heads
A little boy who had recently spent time with his grand parents in a
farmhouse in Arkansas complained of stomach discomfort and reported
blood in his stool. Upon lab exam an organism was readily identified
that appeared to have two disproportionate nuclei.
What might be the cause of the boy's discomfort?
- Entamoeba coli
- Giardia lamblia
- Pentatrichomonas hominis
- Entamoeba polecki
- Balantidium coli✔✔Balantidium coli
A week after attending summer camp for children with downs syndrome,
near the Glendale Hot springs, two of the attendees came down with skin
and eye lesions and a third presented at the emergency room with
seizures. You can have any specimens to aid you in the diagnosis. Which
body specimens would you want to analyze for a definitive diagnosis?
- Saliva
- Blood
- Cerobrospinal fluid
- Feces
- Urine✔✔Cerobrospinal fluid
The organisms that were identified from the kids with the skin and
eye lesions were cysts that appeared wrinkled and angular. Which is the
most likely organism from the group below:
- Iodamoeba bustchili
- Acanthamoeba castellanii.
- Balantiduim coli.
- Naegleria fowleri
and answers
Which of the following statements best describes the process called phagocytosis?
- It requires the rearrangement of clathrin
- Small molecules are usually internalized in this manner
- It is a process performed by specialized cells for the internalization of particles
greater than 0.5um
- All receptors can mediate this process✔✔It is a process performed by specialized
cells for the internalization of particles greater than 0.5um
Which of the following is true:
- Phagosomes are the primary site of protein synthesis in a cell
- Energy metabolism of the cell takes place in the phagosome
- Phagosomes never fuse with lysosomes
- Large internalized particles are directed to phagosomes✔✔Large internalized
particles are directed to phagosomes
Which of the following is not a function of the cell cytoskeleton:
- Provide structural support to maintain cell shape
- Is the force generating apparatus that enables cell mobility and contractility
- It is important for cell-cell recognition
- It contains the machinery that moves organelles within the cell✔✔It is important for
cell-cell recognition
When cells are activated, they can:
- release substances called cytokines
- change their cytoskeletal organization
- change ion permeability
- all of the above✔✔all of the above
Eukaryotic cells differ from prokaryotes in that:
- Their DNA is enclosed in an organelle called a nucleus
- All eukaryotic cells have a mitochondrion
- ATP is generated from the consumption of glucose in Eukaryotes
- All of the above are true
- none of the above is true✔✔Their DNA is enclosed in an organelle called a nucleus
Which of the following is not a component of the innate immune system:
- skin
- complement
- T cells
- linings of internal tracts
,- secretions✔✔T cells
The characteristics of the adaptive immune response are:
1 specificity to the infectious agent
2 the magnitude of the response increases with each encounter
3 T cells and B cells participate in the response
4 1 and 3 are correct
5 1,2 and 3 are correct✔✔1, 2 and 3 are correct
An immunogen that is going to be used for vaccination against Naegleria has been
sitting out in the sun. It is quite likely that it has become denatured. The authorities
want
to know how this might affect the efficacy of the vaccine. You say:
- Neither the T cell response nor the antibody response will be affected
- T cells generated with this denatured immunogen will not respond to the native
Naegleria molecule
- Antibodies cannot be generated to Naegleria molecules
- Antibodies generated to this denatured immunogen will not bind to the native
molecule
on Naegleria
- None of the above is correct.✔✔Antibodies generated to this denatured
immunogen will not bind to the native molecule
on Naegleria
MHC class II molecules are expressed by
A) B cells; B) Erythrocytes. C) Macrophages D) Hepatocytes.
-A
- A and C
- B and D
- A,B,C, and D✔✔- A and C
Two patients were suspected of exposure to a rare parasite. When sera from these
patients were analyzed, patient A had mostly IgM antibodies to the infectious agent
while
patient B had a very high titer of mostly IgG. What can you conclude from these
results?
- Patient A is resistant to the infection
- Patient B has been infected with the parasite for a long time or has been infected
multiple times
- Patient B might have been infected very recently by the parasite
- Some antibodies in patient A's serum might have become degraded
- Niether patient has been exposed to the parasite✔✔Patient B has been infected
with the parasite for a long time or has been infected
multiple times
The strutures in eukaroytic cells that contains 9 pairs of microtubules in the
, periphery and a pair of microtubules in the center are called:
- lysosme
- phagosome
- costa
- parabasal body
- Cilia✔✔Cilia
The motor force for flagellum movement is generated by ----- around the pairs of
microtubules.
- Costa
- actin
- dyenin heads
- intermediate filaments✔✔dyenin heads
A little boy who had recently spent time with his grand parents in a
farmhouse in Arkansas complained of stomach discomfort and reported
blood in his stool. Upon lab exam an organism was readily identified
that appeared to have two disproportionate nuclei.
What might be the cause of the boy's discomfort?
- Entamoeba coli
- Giardia lamblia
- Pentatrichomonas hominis
- Entamoeba polecki
- Balantidium coli✔✔Balantidium coli
A week after attending summer camp for children with downs syndrome,
near the Glendale Hot springs, two of the attendees came down with skin
and eye lesions and a third presented at the emergency room with
seizures. You can have any specimens to aid you in the diagnosis. Which
body specimens would you want to analyze for a definitive diagnosis?
- Saliva
- Blood
- Cerobrospinal fluid
- Feces
- Urine✔✔Cerobrospinal fluid
The organisms that were identified from the kids with the skin and
eye lesions were cysts that appeared wrinkled and angular. Which is the
most likely organism from the group below:
- Iodamoeba bustchili
- Acanthamoeba castellanii.
- Balantiduim coli.
- Naegleria fowleri
