Question 1

Pfiesteria is a(n)  ______ that produces a toxin harmful to humans.

Accepted Answer

A)  endospore
B)  protozoan
C)  helminth
D)  fungus
E)  algaF) B) and D)
G) A) and D)

Question 2

A specimen from a patient suffering diarrhea shows a one-celled organism in the microscope.The organism moves very slowly by protruding its cytoplasm.You would predict that the patient has an infection caused by ______.

Accepted Answer

A)  Entamoeba
B)  Toxoplasma
C)  Plasmodium
D)  Trichomonas
E)  GiardiaF) C) and D)
G) B) and E)

Question 3

The size of a eukaryotic ribosome is ______.

Accepted Answer

A)  40S
B)  70S
C)  50S
D)  80S
E)  30SF) C) and D)
G) A) and C)

Question 4

The nuclear envelope is a single lipid layer.

Accepted Answer

A) True 
 B)False

Question 5

Which organelle is found in algae but not in protozoa or fungi?

Accepted Answer

A)  Endoplasmic reticulum
B)  Chloroplasts
C)  Mitochondria
D)  Golgi apparatus
E)  LysosomesF) B) and D)
G) D) and E)

Question 6

Protozoa are classified into four groups based on ______.

Accepted Answer

A)  their pathogenicity
B)  how they move
C)  their required nutrients
D)  the resistance properties of their cystsE) B) and C)
F) A) and D)

Question 7

Which pair is mismatched?

Accepted Answer

A)  Histoplasma - causes Ohio Valley fever
B)  Giardia - transmitted by feces in drinking water
C)  Trichomonas - sexually transmitted
D)  Trypanosoma - causes African sleeping sickness
E)  Plasmodium - causes Chagas diseaseF) B) and C)
G) A) and B)

Question 8

The plasma cells of the immune system are responsible for secreting protein antibodies into the bloodstream.Within the plasma cell, the antibody moves through several organelles in what order?

Accepted Answer

A)  Ribosomes, Golgi apparatus, endoplasmic reticulum, lysosome
B)  Ribosomes, Golgi apparatus, endoplasmic reticulum, vesicles
C)  Ribosomes, endoplasmic reticulum, nucleolus, Golgi apparatus, vesicles
D)  Ribosomes, endoplasmic reticulum, Golgi apparatus, vesicles
E)  Ribosomes, vesicles, endoplasmic reticulum, Golgi apparatusF) A) and E)
G) A) and D)

Question 9

You are observing an organism under the microscope, and it is clearly multicellular with no cell walls.Your prediction is that this organism is a(n)  ______.

Accepted Answer

A)  alga
B)  fungus
C)  helminth
D)  protozoan
E)  bacteriumF) None of the above
G) A) and E) C

Question 10

In humans, fungi can only infect the skin.

Accepted Answer

A) True 
 B)False

Question 11

Chloroplasts are composed of membranous sacs called ______ that carry chlorophyll.Surrounding these sacs is a ground substance called ______.

Accepted Answer

A)  thylakoids; stroma
B)  grana; stroma
C)  cristae; matrix
D)  cristae; stroma
E)  thylakoid; matrixF) A) and B)
G) None of the above

Question 12

The intertwined mass of hyphae that constitutes the body of a mold is a ______.

Accepted Answer

A)  rhizoid
B)  bud
C)  stock
D)  mycelium
E)  stemF) C) and D)
G) A) and B)

Question 13

The passageways in the nuclear envelope for movement of substances between the nucleus and cytoplasm are called nuclear ______.

Accepted Answer

A)  histones
B)  pores
C)  chromatin
D)  endoplasmic reticulum
E)  inclusionsF) B) and E)
G) A) and C)

Question 14

You are attempting to identify the type of helminth that has been isolated from a patient stool sample.The most important consideration to make this distinction is to

Accepted Answer

A)  examine the sample to see if microscopic eggs are present.
B)  ask the patient about recent food and water consumption.
C)  look at the gross anatomy to determine if the body is segmented or not.
D)  determine if the cells are eukaryotic or bacterial by looking for nuclei.E) All of the above
F) None of the above C

Question 15

Which organelle contains cristae where enzymes and electron carriers for aerobic respiration are found?

Accepted Answer

A)  Endoplasmic reticulum
B)  Golgi apparatus
C)  Mitochondrion
D)  Chloroplast
E)  LysosomeF) A) and B)
G) C) and D)

Question 16

A saprobe differs from a parasite in that

Accepted Answer

A)  a saprobe has the ability to undergo meiosis to produce sexual spores, but a parasite can only perform mitosis to produce asexual spores.
B)  a saprobe derives nutrients from dead plants and animals, but a parasite derives nutrients from living plants and animals.
C)  a saprobe has a pseudohyphae morphology, but a parasite has true hyphae.
D)  a saprobe is a fungus, but a parasite is a protozoan.E) A) and C)
F) A) and D)

Question 17

Rough endoplasmic reticulum is studded with ribosomes.

Accepted Answer

A) True 
 B)False  True

Question 18

You are observing an organism under the microscope and you note that it has a cell wall, no chloroplasts, and a nucleus.Your prediction would be that this organism is a(n)  ______.

Accepted Answer

A)  alga
B)  protozoan
C)  bacterium
D)  fungus
E)  virusF) B) and C)
G) A) and E)

Question 19

Chromosomes are generally not visible by light microscopy unless the cell is undergoing nuclear division.

Accepted Answer

A) True 
 B)False

Question 20

Fungal asexual spores

Accepted Answer

A)  produce offspring with different combinations of genes from the parent.
B)  cannot be seen using a light microscope.
C)  are produced when nutrients are limiting.
D)  are the products of meiotic division by a single parent cell.
E)  are used to identify fungi.F) All of the above
G) B) and D)

Exam 5: Eukaryotic Cells and Microorganisms

Pfiesteria is a(n) ______ that produces a toxin harmful to humans.

Correct AnswerverifiedShow Answer

A specimen from a patient suffering diarrhea shows a one-celled organism in the microscope.The organism moves very slowly by protruding its cytoplasm.You would predict that the patient has an infection caused by ______.

Correct AnswerverifiedShow Answer

The size of a eukaryotic ribosome is ______.

Correct AnswerverifiedShow Answer

The nuclear envelope is a single lipid layer.

Correct AnswerverifiedShow Answer

Which organelle is found in algae but not in protozoa or fungi?

Correct AnswerverifiedShow Answer

Protozoa are classified into four groups based on ______.

Correct AnswerverifiedShow Answer

Which pair is mismatched?

Correct AnswerverifiedShow Answer

The plasma cells of the immune system are responsible for secreting protein antibodies into the bloodstream.Within the plasma cell, the antibody moves through several organelles in what order?

Correct AnswerverifiedShow Answer

You are observing an organism under the microscope, and it is clearly multicellular with no cell walls.Your prediction is that this organism is a(n) ______.

Correct AnswerverifiedC

In humans, fungi can only infect the skin.

Correct AnswerverifiedShow Answer

Chloroplasts are composed of membranous sacs called ______ that carry chlorophyll.Surrounding these sacs is a ground substance called ______.

Correct AnswerverifiedShow Answer

The intertwined mass of hyphae that constitutes the body of a mold is a ______.

Correct AnswerverifiedShow Answer

The passageways in the nuclear envelope for movement of substances between the nucleus and cytoplasm are called nuclear ______.

Correct AnswerverifiedShow Answer

You are attempting to identify the type of helminth that has been isolated from a patient stool sample.The most important consideration to make this distinction is to

Correct AnswerverifiedC

Which organelle contains cristae where enzymes and electron carriers for aerobic respiration are found?

Correct AnswerverifiedShow Answer

A saprobe differs from a parasite in that

Correct AnswerverifiedShow Answer

Rough endoplasmic reticulum is studded with ribosomes.

Correct AnswerverifiedTrue

You are observing an organism under the microscope and you note that it has a cell wall, no chloroplasts, and a nucleus.Your prediction would be that this organism is a(n) ______.

Correct AnswerverifiedShow Answer

Chromosomes are generally not visible by light microscopy unless the cell is undergoing nuclear division.

Correct AnswerverifiedShow Answer

Fungal asexual spores

Correct AnswerverifiedShow Answer

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C

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Chloroplasts are composed of membranous sacs called that carry chlorophyll.Surrounding these sacs is a ground substance called .

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C

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True

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