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Parasitology > Eukaryotic Cell > Flashcards

Eukaryotic Cell Flashcards

1
Q

What is the significance of membranes to host-parasite relations?

a. The parasite has to avoid activating the host via membrane proteins
b. The parasite usually does not have a membrane
c. Parasites make GPI linkages to invade the cell
d. none of the above

A

a. The parasite has to avoid activating the host via membrane proteins

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2
Q

The following can be found in both prokaryotes and eukaryotes except

a. Ribosomes
b. Plasma membrane
c. Nucleus
d. Chromosomes

A

c. Nucleus

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3
Q

True or False: Some cyanobacteria as well as plants are capable of performing photosynthesis

A

True

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4
Q

The endoplasmic reticulum performs which of the following functions:

a. Protein synthesis
b. Lipid synthesis
c. Both a and b
d. None of the above

A

c. Both protein and lipid synthesis

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5
Q

Which of the following proteins span the membrane?

a. lipid anchor proteins
b. integral proteins
c. peripheral proteins
d. all proteins

A

b. integral proteins

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6
Q

Match the following:
[viroid, virus, lysogenic infection, lytic infection]
1. circular RNA with no protein coat
2. virus injects genetic information into host cell DNA and becomes a provirus
3. virus hijacks host cell machinery to replicate itself; kills host cell
4. is not a living cell

A

[viroid] 1. circular RNA with no protein coat
[lysogenic infection] 2. virus injects genetic information into host cell DNA and becomes a provirus
[lytic infection] 3. virus hijacks host cell machinery to replicate itself; kills host cell
[virus] 4. is not a living cell

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7
Q

True or False: The host-pathogen interaction always results in disease.

A

False

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8
Q

True or False: MHC class I and class II are present in all cells, making them antigen presenting cells.

A

False

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9
Q

What are the functions of the cytoskeleton?

a. provide movement of cilia and flagella
b. transport things within the cell
c. two of these
d. it depends on the type of cell

A

c. both

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10
Q

Which of the following membrane proteins include receptors?

a. integral proteins
b. peripheral proteins
c. lipid-anchored proteins
d. a & c
e. all of the above

A

integral and peripheral proteins

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11
Q

The site where synthesized proteins and other materials are sorted, modified and from where they are transported to specific cellular destinations.

A

Golgi apparatus

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12
Q

All of the following are classifications of membrane proteins in a eukaryotic cell EXCEPT

a. peripheral
b. integral
c. phagocytic
d. lipid-anchored

A

c. phagocytic

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13
Q

Phagocytosis is the process by which

a. soluble molecules and small particulate molecules are internalized
b. internalized material is trafficked through vesicles interconnected by tubules
c. specialized cells (macrophages, neutrophils, dendritic cells. internalize particulate material greater than 0.5um in diameter.
d. None of the above.

A

c. specialized cells (macrophages, neutrophils, dendritic cells. internalize particulate material greater than 0.5um in diameter.

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14
Q
  1. What are the classes of endosomes?
    a. early and late
    b. heavy and light
    c. high pH and low pH
    d. functional and nonfunctional
A

a. early and late

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15
Q
  1. What are the classes of phagocytic receptors?
    a. enzyme linked and non-enzyme linked
    b. opsonin-dependent and non-opsonin dependent
    c. unbound and bound
    d. sigma 1 and sigma 2
A

b. opsonin-dependent and non-opsonin dependent

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16
Q

16.What parasite can survive the harsh conditions of lysosomes fusing to the phagosome in which it is contained and prevent the host from killing it?

a. Blastocystis
b. Acanthamoeba
c. Leishmania
d. Babesia

A

c. Leishmania

17
Q

17.Which characteristic is not true of the plasma membrane?

a. It provides a selectively permeable barrier.
b. It ensures compartmentalization within the cell.
c. It transports solutes.
d. It responds to external signals.

A

b. It ensures compartmentalization within the cell.

18
Q

Which of the following is false regarding commensal microbes?

a. Antigenic and can elicit antibody responses
b. Synthesize metabolites that are essential nutrients for the host
c. Acquired by infection
d. All of the above are true

A

d. All of the above are true

19
Q

Which of the following is not involved in motility of the cell?

a. actin
b. kinesins
c. keratin
d. dyneins

A

c. keratin

20
Q

.Which of the following is true about phagocytosis (e.g., the endocytic pathway of parasites)?

a. Phagocytosis is the process by which specialized cells internalize particulate material greater than 1.5 um in diameter.
b. Phagocytosis is dependent on microfilaments.
c. Natural killer cells are the specialized cells for phagocytosis.
d. None of them are true.

A

b. Phagocytosis is dependent on microfilaments.

21
Q

Which of the following is incorrect?

a. Being diploid allows the parasites to combine its chromosome and generates diversity.
b. The advantage of being diploid is different from the advantage of sexual reproduction in parasites.
c. All parasites known are diploid.
d. DNA is packaged into chromosomes

A

c. All parasites known are diploid.

22
Q

Which is NOT a part of the eukaryotic cell nucleus?

a. Ribosomes
b. Nucleolus
c. Chromatin
d. Nuclear envelope

A

a. Ribosomes

23
Q

Which of the following describes the fluid-mosaic model of the plasma membrane?

a. phospholipid monolayer with embedded proteins
b. phospholipid bilayer with embedded proteins
c. phospholipid bilayer without embedded proteins
d. B and C are correct

A

b. phospholipid bilayer with embedded proteins

24
Q

_________ proteins are covalently linked to membrane via a lipid molecule.

A

Lipid anchored I lipid anchor

25
Q

True or False: Lipid-soluble molecules, such as alcohols, cannot diffuse through the plasma membrane.

A

False

26
Q

Drugs that limit or restrict worm mobility in the gastrointestinal tract MOST LIKELY involve which of the following cell feature that helps increase the effectiveness of the treatment?

a. the worm’s immune system
b. the worm’s cytoskeleton
c. the host’s immune system
d. all of the above

A

b. the worm’s cytoskeleton

Parasitology (5 decks)

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