Question 1

During cell division the progeny of a trypanosome express a different VSG gene than their parents.Why is this done?

Accepted Answer

A) To hide from the host's immune system. 
B) To signal endocytosis of the parasites. 
C) VSG genes inhibit phagocytosis. 
D) VSG genes activate photoheterotrophy. 
A) To hide from the host's immune system. 
B) To signal endocytosis of the parasites. 
C) VSG genes inhibit phagocytosis. 
D) VSG genes activate photoheterotrophy.

Question 2

What type of cellular damage in a malarial parasite would prevent it from penetrating a red blood cell?

Accepted Answer

A) Mutation in the variable surface glycoprotein genes 
B) A disruption of the cytoskeletal proteins 
C) Failure of the cross-linking of the peptidoglycans 
D) Damage to the choanocytes 
A) Mutation in the variable surface glycoprotein genes 
B) A disruption of the cytoskeletal proteins 
C) Failure of the cross-linking of the peptidoglycans 
D) Damage to the choanocytes

Question 3

Which phrase best describes the characteristics of plasmodium?

Accepted Answer

A) Plasmodial slime molds consist of large multinucleate single cells. 
B) Plasmodial slime molds consist of large single nucleate cells. 
C) Plasmodial slime molds are multicellular. 
D) Plasmodium cells contain a pellicle. 
A) Plasmodial slime molds consist of large multinucleate single cells. 
B) Plasmodial slime molds consist of large single nucleate cells. 
C) Plasmodial slime molds are multicellular. 
D) Plasmodium cells contain a pellicle.

Question 4

Which feature of mitochondria provides the least amount of information about their endosymbiotic origins?

Accepted Answer

A) Circular chromosome 
B) Mode of replication 
C) Independent replication 
D) Phospholipids in the membranes 
A) Circular chromosome 
B) Mode of replication 
C) Independent replication 
D) Phospholipids in the membranes

Question 5

A patient,Jennifer,presents in an ER with severe stomach cramps and diarrhea.She was recently swimming in unclean water.Which protist would be the most likely cause of her symptoms?

Accepted Answer

A) Toxoplasma gondii 
B) Plasmodium 
C) Leishmaniasis 
D) Giardia 
A) Toxoplasma gondii 
B) Plasmodium 
C) Leishmaniasis 
D) Giardia

Question 6

The organism,Phytophthora infestans,responsible for the Irish Potato Famine of 1845 and 1847 belongs to

Accepted Answer

A) Euglenozoa. 
B) Alveolata. 
C) Rhodophyta. 
D) Chlorophyta. 
E) Stramenopila. 
A) Euglenozoa. 
B) Alveolata. 
C) Rhodophyta. 
D) Chlorophyta. 
E) Stramenopila.

Question 7

The polysaccharides agarose and carrageenan are isolated from red algae for commercial use.These polysaccharides are found in cell walls.What plant polysaccharide are they analogous to?

Accepted Answer

A) Amylose 
B) Collagen 
C) Cellulose 
D) elastin 
E) Mannose 
A) Amylose 
B) Collagen 
C) Cellulose 
D) elastin 
E) Mannose

Question 8

A biologist uses a time machine to collect living material from 2 different time periods.Sample A is 3 billion years old and sample B is 1.5 billion years old.How would these samples differ?

Accepted Answer

A) Prokaryotic organisms would be abundant in sample A but absent from sample B. 
B) Eukaryotic organisms would be present in both samples but much more common in sample B. 
C) Prokaryotic organisms would only occur in sample B. 
D) Eukaryotic organisms would be absent from sample A. 
A) Prokaryotic organisms would be abundant in sample A but absent from sample B. 
B) Eukaryotic organisms would be present in both samples but much more common in sample B. 
C) Prokaryotic organisms would only occur in sample B. 
D) Eukaryotic organisms would be absent from sample A.

Question 9

The concept of endosymbiosis is widely accepted.What kind of relationship is it?

Accepted Answer

A) One organism in the partnership benefits and the other is harmed. 
B) Both organisms in the partnership benefit. 
C) Neither organism benefits. 
D) One organism benefits but the other is not affected. 
A) One organism in the partnership benefits and the other is harmed. 
B) Both organisms in the partnership benefit. 
C) Neither organism benefits. 
D) One organism benefits but the other is not affected.

Question 10

In addition to their characteristic cilia,most ciliates contain two types of

Accepted Answer

A) nuclei. 
B) chloroplasts. 
C) flagella. 
D) wood-digesting enzymes. 
E) cysts. 
A) nuclei. 
B) chloroplasts. 
C) flagella. 
D) wood-digesting enzymes. 
E) cysts.

Question 11

Which one of these groups is not one of the six supergroups that protists are contained in?

Accepted Answer

A) Ascomycota 
B) Ophisthokonta 
C) Rhizaria 
D) Amoebozoa 
E) Archaeplastida 
A) Ascomycota 
B) Ophisthokonta 
C) Rhizaria 
D) Amoebozoa 
E) Archaeplastida

Question 12

Which one of the following statements about diplomonads and parabasilids is false?

Accepted Answer

A) Absence of mitochondria in these groups is an ancestral trait. 
B) Some members are parasitic,but some also engage in mutualism. 
C) Diplomonads and parabasilids belong to different clades 
D) Both groups are flagellated protists. 
A) Absence of mitochondria in these groups is an ancestral trait. 
B) Some members are parasitic,but some also engage in mutualism. 
C) Diplomonads and parabasilids belong to different clades 
D) Both groups are flagellated protists.

Question 13

Which of these is not part of the life cycle of brown algae?

Accepted Answer

A) meiosis 
B) multicellular haploid stage 
C) multicellular diploid stage 
D) gametes produced by mitosis 
E) spores produced by mitosis 
A) meiosis 
B) multicellular haploid stage 
C) multicellular diploid stage 
D) gametes produced by mitosis 
E) spores produced by mitosis

Question 14

Conjugating ciliates exchange a pair of haploid micronuclei that undergo mitosis as a diploid micronucleus,while the macronucleus in each

Accepted Answer

A) is expelled from the cell. 
B) disintegrates. 
C) divides by meiosis. 
D) fuses with each other. 
E) shrinks and becomes diploid micronuclei. 
A) is expelled from the cell. 
B) disintegrates. 
C) divides by meiosis. 
D) fuses with each other. 
E) shrinks and becomes diploid micronuclei.

Question 15

Which of the following statements about malaria is false?

Accepted Answer

A) Fertilization occurs within a mosquito. 
B) Merozoites are found inside red blood cells. 
C) Gametocytes develop from merozoites. 
D) Sporozoites are only found within a mosquito. 
E) Gametocytes are passed to a feeding mosquito. 
A) Fertilization occurs within a mosquito. 
B) Merozoites are found inside red blood cells. 
C) Gametocytes develop from merozoites. 
D) Sporozoites are only found within a mosquito. 
E) Gametocytes are passed to a feeding mosquito.

Question 16

All apicomplexans are nonmotile,spore forming,and live as ________ in animals.

Accepted Answer

The answer of All apicomplexans are nonmotile,spore forming,and live as...

Question 17

The White Cliffs of Dover,a famous landmark in England,is made of limestone,which is really a collection of the pore-studded shells (tests)of

Accepted Answer

A) diatoms. 
B) dinoflagellates. 
C) brown algae. 
D) spirochetes. 
E) foraminifera. 
A) diatoms. 
B) dinoflagellates. 
C) brown algae. 
D) spirochetes. 
E) foraminifera.

Question 18

Which feature unites paramecia,malarial parasites,and dinoflagellates into a single group?

Accepted Answer

A) The use of cilia 
B) A parasitic life style 
C) The presence of a nucleus 
D) The type of ribosomes 
E) The possession of alveoli 
A) The use of cilia 
B) A parasitic life style 
C) The presence of a nucleus 
D) The type of ribosomes 
E) The possession of alveoli

Question 19

What features of charophytes provides evidence for charophytes being the closest relative to land plants?

Accepted Answer

A) Charophytes possess plasmodesmata. 
B) Charophytes are the only photosynthetic protists. 
C) Charophytes are fully terrestrial. 
D) Charophytes produce seeds and flowers. 
A) Charophytes possess plasmodesmata. 
B) Charophytes are the only photosynthetic protists. 
C) Charophytes are fully terrestrial. 
D) Charophytes produce seeds and flowers.

Question 20

Protists are classified into a single kingdom because of which of the following features?

Accepted Answer

A) They are eukaryotes,but not fungi,plants,or animals. 
B) They are microscopic. 
C) They are unicellular. 
D) All types of nutritional modes are found. 
E) They are monophyletic. 
A) They are eukaryotes,but not fungi,plants,or animals. 
B) They are microscopic. 
C) They are unicellular. 
D) All types of nutritional modes are found. 
E) They are monophyletic.

Exam 28: Protists

During cell division the progeny of a trypanosome express a different VSG gene than their parents.Why is this done?

What type of cellular damage in a malarial parasite would prevent it from penetrating a red blood cell?

Which phrase best describes the characteristics of plasmodium?

Which feature of mitochondria provides the least amount of information about their endosymbiotic origins?

A patient,Jennifer,presents in an ER with severe stomach cramps and diarrhea.She was recently swimming in unclean water.Which protist would be the most likely cause of her symptoms?

The organism,Phytophthora infestans,responsible for the Irish Potato Famine of 1845 and 1847 belongs to

The polysaccharides agarose and carrageenan are isolated from red algae for commercial use.These polysaccharides are found in cell walls.What plant polysaccharide are they analogous to?

A biologist uses a time machine to collect living material from 2 different time periods.Sample A is 3 billion years old and sample B is 1.5 billion years old.How would these samples differ?

The concept of endosymbiosis is widely accepted.What kind of relationship is it?

In addition to their characteristic cilia,most ciliates contain two types of

Which one of these groups is not one of the six supergroups that protists are contained in?

Which one of the following statements about diplomonads and parabasilids is false?

Which of these is not part of the life cycle of brown algae?

Conjugating ciliates exchange a pair of haploid micronuclei that undergo mitosis as a diploid micronucleus,while the macronucleus in each

Which of the following statements about malaria is false?

All apicomplexans are nonmotile,spore forming,and live as ________ in animals.

The White Cliffs of Dover,a famous landmark in England,is made of limestone,which is really a collection of the pore-studded shells (tests)of

Which feature unites paramecia,malarial parasites,and dinoflagellates into a single group?

What features of charophytes provides evidence for charophytes being the closest relative to land plants?

Protists are classified into a single kingdom because of which of the following features?

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The Chemical Building Blocks of Life

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Energy and Metabolism

How Cells Harvest Energy

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Cell Communication

How Cells Divide

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