Question 1

Biologists have found evidence that eukaryotic cells evolved from prokaryotic organisms by a process of intracellular ______.

Accepted Answer

A)   commensalism
B)   parasitism
C)   symbiosis
D)   mutualismE) A) and B)
F) C) and D)

Question 2

During unfavorable growth conditions,many protozoa can convert to a resistant,dormant stage called a(n) ______.

Accepted Answer

A)   seed
B)   trophozoite
C)   endospore
D)   cyst
E)   sporozoaF) B) and D)
G) B) and C)

Question 3

All algae have chloroplasts.

Accepted Answer

A) True 
 B)False

Question 4

The series of tunnel-like membranes functioning in transport and storage are the ______.

Accepted Answer

A)   chloroplasts
B)   Golgi apparatus
C)   endoplasmic reticulum
D)   mitochondria
E)   lysosomesF) C) and E)
G) B) and E)

Question 5

Fungi reproduce sexually less frequently than asexually.What might be the reason behind this infrequency of sexual reproduction?

Accepted Answer

A)   Sexual reproduction requires two genetically different strains of the fungus to come together.
B)   Sexual reproduction is more energy-intensive than asexual reproduction.
C)   In asexual reproduction, one parent divides.
D)   All statements are true.E) None of the above
F) A) and B)

Question 6

The endosymbiotic theory says that precursor eukaryotic cells acquired cilia by endosymbiosis with a(n) _____ ancestor and others gained photosynthetic ability from endosymbiosis with a(n) _____ ancestor.

Accepted Answer

A)   archaeal, cyanobacterial
B)   protozoan, algal
C)   spiral, cyanobacterial
D)   helminth, algalE) A) and D)
F) C) and D)

Question 7

Fungi can reproduce both sexually and asexually.

Accepted Answer

A) True 
 B)False

Question 8

The size of a eukaryotic ribosome is ______.

Accepted Answer

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

Question 9

The nuclear envelope is a single lipid layer.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is found in eukaryotic cells but not in bacterial cells?

Accepted Answer

A)   Nucleus
B)   Mitochondria
C)   Endoplasmic reticulum
D)   Lysosomes
E)   All of the choices are correct.F) C) and D)
G) A) and B)

Question 11

The site for ribosomal RNA synthesis is the ______.

Accepted Answer

A)   Golgi apparatus
B)   nucleus
C)   ribosome
D)   lysosome
E)   nucleolusF) A) and E)
G) A) and D)

Question 12

Parasitic helminths have a highly developed ______ system to enhance host transmission.

Accepted Answer

A)   muscular
B)   nervous
C)   digestive
D)   respiratory
E)   reproductiveF) A) and B)
G) B) and D)

Question 13

A protozoan having a flagellum would be classified in the genus ______.

Accepted Answer

A)   Entamoeba
B)   Toxoplasma
C)   Trypanosoma
D)   Enterobius
E)   PlasmodiumF) A) and B)
G) C) and D)

Question 14

A group of protozoa that are not motile are the ______.

Accepted Answer

A)   Plasmodium sp.
B)   ciliates
C)   amoebas
D)   dimorphics
E)   trophozoitesF) All of the above
G) C) and D)

Question 15

Protozoan cells do not exhibit ______.

Accepted Answer

A)   motility
B)   a cell wall
C)   heterotrophic nutrition
D)   cyst formation
E)   ectoplasm and endoplasmF) A) and C)
G) C) and D)

Question 16

Adulthood and mating of helminths occur in which host?

Accepted Answer

A)   Primary host
B)   Secondary host
C)   Definitive host
D)   Transport host
E)   Mating occurs in all hosts.F) B) and E)
G) A) and E)

Question 17

Protozoan endoplasm contains ______.

Accepted Answer

A)   cilia
B)   oral grooves
C)   ectoplasm
D)   flagella
E)   mitochondriaF) A) and E)
G) A) and B)

Question 18

Endosymbiosis of cyanobacteria is widely accepted as an explanation for the development of chloroplasts.The presence of endosymbiotic cyanobacteria provided a cell with the advantage of ______.

Accepted Answer

A)   tolerance to oxygen
B)   photosynthesis
C)   an electron transport chain
D)   simple, rapid gene transfer
E)   a membrane-bound nucleusF) C) and E)
G) B) and E)

Question 19

The long,thread-like branching cells of molds are called ______.

Accepted Answer

A)   pseudohyphae
B)   asci
C)   conidiophores
D)   septa
E)   hyphaeF) B) and D)
G) C) and E)

Question 20

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) C) and D)
F) All of the above

Exam 5: Eukaryotic Cells and Microorganisms

A group of protozoa that are not motile are the ______.

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Endosymbiosis of cyanobacteria is widely accepted as an explanation for the development of chloroplasts.The presence of endosymbiotic cyanobacteria provided a cell with the advantage of ______.

Correct AnswerverifiedShow Answer

Fungi reproduce sexually less frequently than asexually.What might be the reason behind this infrequency of sexual reproduction?

Correct AnswerverifiedShow Answer

Parasitic helminths have a highly developed ______ system to enhance host transmission.

Correct AnswerverifiedShow Answer

Protozoan endoplasm contains ______.

Correct AnswerverifiedShow Answer

During unfavorable growth conditions,many protozoa can convert to a resistant,dormant stage called a(n) ______.

Correct AnswerverifiedShow Answer

Protozoan cells do not exhibit ______.

Correct AnswerverifiedShow Answer

The endosymbiotic theory says that precursor eukaryotic cells acquired cilia by endosymbiosis with a(n) _____ ancestor and others gained photosynthetic ability from endosymbiosis with a(n) _____ ancestor.

Correct AnswerverifiedShow Answer

A saprobe differs from a parasite in that

Correct AnswerverifiedShow Answer

All algae have chloroplasts.

Correct AnswerverifiedShow Answer

The series of tunnel-like membranes functioning in transport and storage are the ______.

Correct AnswerverifiedShow Answer

Which of the following is found in eukaryotic cells but not in bacterial cells?

Correct AnswerverifiedShow Answer

The site for ribosomal RNA synthesis is the ______.

Correct AnswerverifiedShow Answer

The size of a eukaryotic ribosome is ______.

Correct AnswerverifiedShow Answer

Adulthood and mating of helminths occur in which host?

Correct AnswerverifiedShow Answer

Fungi can reproduce both sexually and asexually.

Correct AnswerverifiedShow Answer

A protozoan having a flagellum would be classified in the genus ______.

Correct AnswerverifiedShow Answer

The long,thread-like branching cells of molds are called ______.

Correct AnswerverifiedShow Answer

The nuclear envelope is a single lipid layer.

Correct AnswerverifiedShow Answer

Biologists have found evidence that eukaryotic cells evolved from prokaryotic organisms by a process of intracellular ______.

Correct AnswerverifiedShow Answer

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The endosymbiotic theory says that precursor eukaryotic cells acquired cilia by endosymbiosis with a(n) _ ancestor and others gained photosynthetic ability from endosymbiosis with a(n) _ ancestor.

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