Question 1

In the infamous anthrax attacks of 2001,several letters were received at the offices of two U.S.senators and various news media outlets.The letters contained dry granular or powdery material.Seventeen people who came into contact with the material from the letters suffered anthrax infections; five more died of anthrax.How could dried-out material cause anthrax?

Accepted Answer

A)   Anthrax bacteria are acellular infectious particles. When they came into contact with living hosts, they entered the hosts' cells, took over their metabolic machinery, and caused them to produce more bacteria.
B)   Anthrax bacteria can form endospores under harsh environmental conditions. The material in the letters contained endospores of anthrax bacteria, which germinated and grew in the more favorable environment of the victim's bodies.
C)   Anthrax bacteria can form endospores in order to reproduce. A few active bacteria in the letters started to produce enormous numbers of endospores upon contact with the anthrax victims.
D)   Anthrax endospores are highly motile by flagella. When the endospores came into contact with human hosts, they swarmed into the bodies of their victims.
E)   None of the choices are correct.F) A) and E)
G) B) and C)

Question 2

Which group of algae will have calcium carbonate within their cell walls?

Accepted Answer

A)   red algae
B)   green algae
C)   brown algae
D)   diatoms
E)   filamentous algaeF) B) and E)
G) A) and B)

Question 3

Which of the following are acellular?

Accepted Answer

A)   prions
B)   protozoans
C)   archaea
D)   algae
E)   bacteriaF) B) and D)
G) A) and E)

Question 4

Which similarity is not shared between algae and plants?

Accepted Answer

A)   Algae are eukaryotes.
B)   Algae are photoautotrophs.
C)   Algae are producers.
D)   Algae were once classified as plants.
E)   Most algae have some form of locomotion.F) B) and C)
G) A) and E) E

Question 5

Which of the following statements is incorrect for all viruses?

Accepted Answer

A)   Viruses have an inner core of nucleic acid.
B)   Viruses have a protein capsid.
C)   Viruses are obligate intracellular parasites.
D)   Viruses have envelopes.
E)   Viral genomes may consist of either DNA or RNA.F) B) and E)
G) All of the above

Question 6

Which archaea use a pigment related to the rhodopsin in our eyes to absorb solar energy and pump chloride ions?

Accepted Answer

A)   methanogens
B)   halophiles
C)   thermoacidophiles
D)   alkaliphiles
E)   psychrophilesF) D) and E)
G) C) and E)

Question 7

A virus is specific to a particular type of host cell because

Accepted Answer

A)   only certain hosts enter the environment inhabited by the virus.
B)   not every virus contains metabolic machinery which can replace that of the host cell.
C)   a glycoprotein spike or a portion of the capsid adheres to a receptor on the surface of a compatible host cell.
D)   a host cell must be malfunctioning, or a virus cannot infect it.
E)   the genome of the virus must be similar to that of its potential host.F) A) and B)
G) A) and C)

Question 8

Which of these does not belong in any Domain of life?

Accepted Answer

A)   protozoans
B)   algae
C)   viruses
D)   archaea
E)   bacteriaF) A) and B)
G) None of the above C

Question 9

Which of these is mismatched?

Accepted Answer

A)   Paramecium - ciliate
B)   Chlamydomonas - green alga
C)   Plasmodium - sporozoan
D)   Giardia - zooflagellate
E)   Salmonella - amoebaF) C) and D)
G) A) and B)

Question 10

Viroids and prions are alike in that both are infectious

Accepted Answer

A)   cell types.
B)   proteins.
C)   molecules.
D)   DNA.
E)   RNA.F) A) and B)
G) B) and E)

Question 11

Your task as a researcher is to develop a new drug to prevent retrovirus infections in newly exposed individuals.Which of the means listed is likely to be the most effective?

Accepted Answer

A)   blocking enzyme action
B)   destroying the viral genome
C)   dissolving the capsid
D)   preventing conjugation
E)   disrupting the viral envelopeF) C) and E)
G) A) and B) A

Question 12

What is the main structural difference between a virus and a viroid?

Accepted Answer

A)   viroids do not have a capsid covering
B)   viruses do not have a capsid covering
C)   viroids contain DNA while viruses do not
D)   Viruses contain RNA while viroids do not
E)   there is no structural difference between the twoF) A) and E)
G) C) and D)

Question 13

Without bacteria in the environment

Accepted Answer

A)   adequate amounts of carbon would not be available to living organisms.
B)   plants would not be able to grow due to lack of nitrogen.
C)   bioremediation would have limited use as a tool to clean up pollutants.
D)   there would be a shortage of decomposer organisms.
E)   All of the choices are correct.F) B) and C)
G) A) and C)

Question 14

Which of the following is not caused by an emerging virus?

Accepted Answer

A)   acquired immunodeficiency syndrome (AIDS) 
B)   chickenpox
C)   bird flu
D)   ebola
E)   severe acute respiratory syndrome (SARS) F) B) and C)
G) A) and D)

Question 15

Which group of organisms are viroids,instead of viruses,most likely to parasitize?

Accepted Answer

A)   plants
B)   bacteria
C)   fish
D)   fungi
E)   cattleF) All of the above
G) A) and B)

Question 16

Which of the following contains no photosynthetic organisms?

Accepted Answer

A)   protists
B)   bacteria
C)   archaea
D)   zooflagellates
E)   prokaryotesF) C) and D)
G) B) and E)

Question 17

One group of protozoans which are non-motile,produce spores,and have disease-causing species is the

Accepted Answer

A)   foraminiferans.
B)   trypanosomes.
C)   sporozoans.
D)   amoeboids.
E)   radiolarians.F) A) and B)
G) B) and E)

Question 18

Pathogens are disease-causing

Accepted Answer

A)   bacteria only.
B)   viruses only.
C)   protists only.
D)   viroids only.
E)   microbes.F) C) and D)
G) A) and B)

Question 19

What feature enables the paramecium to move?

Accepted Answer

A)   cilia
B)   contractile vacuole
C)   flagella
D)   nucleus
E)   pseudopodiaF) B) and E)
G) B) and D)

Question 20

Which of the following groups has at least some members with cell walls?

Accepted Answer

A)   protists only
B)   bacteria only
C)   archaea only
D)   prokaryotes only
E)   protists, bacteria, and archaeaF) A) and B)
G) C) and D)

Exam 17: The Microorganisms: Viruses, bacteria, and Protists

Correct Answer
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Which group of algae will have calcium carbonate within their cell walls?

Correct Answer
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Which of the following are acellular?

Correct Answer
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Which similarity is not shared between algae and plants?

Correct Answer
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E

Which of the following statements is incorrect for all viruses?

Correct Answer
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Which archaea use a pigment related to the rhodopsin in our eyes to absorb solar energy and pump chloride ions?

Correct Answer
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A virus is specific to a particular type of host cell because

Correct Answer
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Which of these does not belong in any Domain of life?

Correct Answer
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C

Which of these is mismatched?

Correct Answer
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Viroids and prions are alike in that both are infectious

Correct Answer
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Your task as a researcher is to develop a new drug to prevent retrovirus infections in newly exposed individuals.Which of the means listed is likely to be the most effective?

Correct Answer
verified
A

What is the main structural difference between a virus and a viroid?

Correct Answer
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Without bacteria in the environment

Correct Answer
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Which of the following is not caused by an emerging virus?

Correct Answer
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Which group of organisms are viroids,instead of viruses,most likely to parasitize?

Correct Answer
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Which of the following contains no photosynthetic organisms?

Correct Answer
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One group of protozoans which are non-motile,produce spores,and have disease-causing species is the

Correct Answer
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Pathogens are disease-causing

Correct Answer
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What feature enables the paramecium to move?

Correct Answer
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Which of the following groups has at least some members with cell walls?

Correct Answer
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Exam 17: The Microorganisms: Viruses, bacteria, and Protists

Correct AnswerverifiedShow Answer

Which group of algae will have calcium carbonate within their cell walls?

Correct AnswerverifiedShow Answer

Which of the following are acellular?

Correct AnswerverifiedShow Answer

Which similarity is not shared between algae and plants?

Correct AnswerverifiedE

Which of the following statements is incorrect for all viruses?

Correct AnswerverifiedShow Answer

Which archaea use a pigment related to the rhodopsin in our eyes to absorb solar energy and pump chloride ions?

Correct AnswerverifiedShow Answer

A virus is specific to a particular type of host cell because

Correct AnswerverifiedShow Answer

Which of these does not belong in any Domain of life?

Correct AnswerverifiedC

Which of these is mismatched?

Correct AnswerverifiedShow Answer

Viroids and prions are alike in that both are infectious

Correct AnswerverifiedShow Answer

Your task as a researcher is to develop a new drug to prevent retrovirus infections in newly exposed individuals.Which of the means listed is likely to be the most effective?

Correct AnswerverifiedA

What is the main structural difference between a virus and a viroid?

Correct AnswerverifiedShow Answer

Without bacteria in the environment

Correct AnswerverifiedShow Answer

Which of the following is not caused by an emerging virus?

Correct AnswerverifiedShow Answer

Which group of organisms are viroids,instead of viruses,most likely to parasitize?

Correct AnswerverifiedShow Answer

Which of the following contains no photosynthetic organisms?

Correct AnswerverifiedShow Answer

One group of protozoans which are non-motile,produce spores,and have disease-causing species is the

Correct AnswerverifiedShow Answer

Pathogens are disease-causing

Correct AnswerverifiedShow Answer

What feature enables the paramecium to move?

Correct AnswerverifiedShow Answer

Which of the following groups has at least some members with cell walls?

Correct AnswerverifiedShow Answer

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E

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C

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A

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