Question 1

Prokaryotes generally range in size from

Accepted Answer

A)  10-400 nm.
B)  20-300 mm.
C)  10-100 µm.
D)  1-10 µm.
E)  50-100nm.F) C) and E)
G) None of the above

Question 2

Which statement is true about prokaryotes?

Accepted Answer

A)  They contain a nucleus.
B)  They lack ribosomes.
C)  They usually lack a cell wall.
D)  They do not divide by mitosis.
E)  They contain a single circular DNA molecule as the genetic material.F) A) and B)
G) D) and E) D

Question 3

In order to infect a cell,a virus must

Accepted Answer

A)  inject its protein into the cell while the nucleic acid remains attached to the host cell surface.
B)  have a special protein on its surface that can interact with a protein on the surface of the host cell.
C)  actively burrow through the cell wall or cell membrane of the host cell to reach the cell's nucleus.
D)  produce a special extension of its cytoplasm when it comes into contact with the appropriate host cell.E) A) and D)
F) B) and C)

Question 4

Bacteriophages carry portions of bacterial DNA from one cell to another in a process called

Accepted Answer

A)  transformation.
B)  transduction.
C)  conjugation.
D)  infection.
E)  replication.F) A) and B)
G) A) and D) B

Question 5

Chemoautotrophs oxidize which of the following to obtain the energy necessary to reduce carbon dioxide to an organic compound?

Accepted Answer

A)  hydrogen gas
B)  hydrogen sulfide
C)  ammonia
D)  All of the above choices are correct.
E)  hydrogen sulfide and ammonia only.F) A) and D)
G) A) and C)

Question 6

Ivanowsky first recognized that something smaller than a bacterium,called a filterable virus,was able to cause disease in the year

Accepted Answer

A)  1965.
B)  2001.
C)  1892.
D)  1700.
E)  1650.F) D) and E)
G) B) and E)

Question 7

When conditions are unfavorable,some Gram positive bacteria form

Accepted Answer

A)  pili.
B)  endospores.
C)  galls.
D)  capsules.
E)  thylakoids.F) A) and E)
G) All of the above

Question 8

All of the following are means of genetic recombination in prokaryotes EXCEPT

Accepted Answer

A)  conjugation.
B)  transformation.
C)  transduction.
D)  crossing over.E) A) and C)
F) All of the above

Question 9

Which of the following is a mismatch?

Accepted Answer

A)  thermophiles - live in extremely cold temperatures
B)  methanogens - prefer anaerobic environments
C)  halophiles - live in high salt environments
D)  thermoacidophiles - live in high temperatures and acidic environmentsE) A) and B)
F) C) and D) A

Question 10

What are the two Domains that the prokaryotes are classified under?

Accepted Answer

A)  Archaea & Bacteria
B)  Eukarya & Bacteria
C)  Archaea & Eukarya
D)  Protista & ArchaeaE) None of the above
F) B) and C)

Question 11

Which of the following could be used to grow lysogenic viruses in the laboratory?

Accepted Answer

A)  chicken eggs
B)  cell culture
C)  bacteria
D)  All of the choices could be used.E) None of the above
F) C) and D)

Question 12

Which of the following is not part of the reproduction cycle of HIV?

Accepted Answer

A)  Reverse transcription of the viral RNA
B)  Reverse transcription of the viral DNA
C)  Maturation of the viruses
D)  Biosynthesis of the viral mRNAE) B) and C)
F) A) and B)

Question 13

Which description best describes the cell wall of a Gram-positive bacteria?

Accepted Answer

A)  It is composed of a single plasma membrane and a thin outer layer of peptidoglycan.
B)  It is composed of a double layer in the plasma membrane and a thin outer layer of peptidoglycan.
C)  It is composed of a double layer in the plasma membrane and a thick outer layer of peptidoglycan.
D)  It is composed of a single plasma membrane and a thick outer layer of peptidoglycan.
E)  It is composed of a single plasma membrane and a thin outer layer of cellulose.F) All of the above
G) C) and E)

Question 14

Study the life cycle diagram.Label A is the ________ life cycle.

Accepted Answer

A)  lysogenic
B)  sexual
C)  lytic
D)  alternation of generationsE) C) and D)
F) A) and C)

Question 15

The cycle of viral infection of a bacterial cell that will cause its death most rapidly is called the _______ cycle.

Accepted Answer

A)  lysogenic
B)  lysozyme
C)  lytic
D)  lysol
E)  lysosomeF) C) and D)
G) B) and D)

Question 16

If a virus is latent,it

Accepted Answer

A)  cannot be a retrovirus.
B)  has not entered a lytic cycle.
C)  has not entered a lysogenic cycle.
D)  is gaining a new envelope via "budding."
E)  is easy to develop immunity against it.F) A) and E)
G) A) and B)

Question 17

A lichen is a symbiotic relationship between cyanobacteria and fungi.

Accepted Answer

A) True 
 B)False

Question 18

Which statement is NOT true about a retrovirus?

Accepted Answer

A)  It may cause cancer or AIDS.
B)  It contains reverse transcriptase.
C)  It remains in the host cell genome,but is not replicated when host DNA is replicated.
D)  It has the capacity to integrate cDNA into the host DNA of the cell it infects.E) B) and D)
F) B) and C)

Question 19

Which group of Archaea are chemoautotrophic anaerobes that will use hydrogen as an electron donor?

Accepted Answer

A)  Halophiles
B)  Methanogens
C)  Thermoacidophiles
D)  CyanobacteriaE) A) and D)
F) C) and D)

Question 20

Influenza strains that sweep around the world often carry names such as Shanghai H1N1 or Mexico City H2N2.The viruses vary in H and N surface proteins because

Accepted Answer

A)  the viruses reproduce and attack people in cities more often.
B)  these viruses emerged as stray DNA from the genomes of people in these cities.
C)  this is where the antibodies of immune people began to break down and the old virus was again virulent.
D)  when infected people develop immunity to the present virus,strains that mutate sufficiently to be outside the range of immunity are soon spread in highly populated areas.E) C) and D)
F) B) and C)

Exam 20: Viruses,bacteria,and Archaea

Prokaryotes generally range in size from

Correct AnswerverifiedShow Answer

Which statement is true about prokaryotes?

Correct AnswerverifiedD

In order to infect a cell,a virus must

Correct AnswerverifiedShow Answer

Bacteriophages carry portions of bacterial DNA from one cell to another in a process called

Correct AnswerverifiedB

Chemoautotrophs oxidize which of the following to obtain the energy necessary to reduce carbon dioxide to an organic compound?

Correct AnswerverifiedShow Answer

Ivanowsky first recognized that something smaller than a bacterium,called a filterable virus,was able to cause disease in the year

Correct AnswerverifiedShow Answer

When conditions are unfavorable,some Gram positive bacteria form

Correct AnswerverifiedShow Answer

All of the following are means of genetic recombination in prokaryotes EXCEPT

Correct AnswerverifiedShow Answer

Which of the following is a mismatch?

Correct AnswerverifiedA

What are the two Domains that the prokaryotes are classified under?

Correct AnswerverifiedShow Answer

Which of the following could be used to grow lysogenic viruses in the laboratory?

Correct AnswerverifiedShow Answer

Which of the following is not part of the reproduction cycle of HIV?

Correct AnswerverifiedShow Answer

Which description best describes the cell wall of a Gram-positive bacteria?

Correct AnswerverifiedShow Answer

Study the life cycle diagram.Label A is the ________ life cycle.

Correct AnswerverifiedShow Answer

The cycle of viral infection of a bacterial cell that will cause its death most rapidly is called the _______ cycle.

Correct AnswerverifiedShow Answer

If a virus is latent,it

Correct AnswerverifiedShow Answer

A lichen is a symbiotic relationship between cyanobacteria and fungi.

Correct AnswerverifiedShow Answer

Which statement is NOT true about a retrovirus?

Correct AnswerverifiedShow Answer

Which group of Archaea are chemoautotrophic anaerobes that will use hydrogen as an electron donor?

Correct AnswerverifiedShow Answer

Influenza strains that sweep around the world often carry names such as Shanghai H1N1 or Mexico City H2N2.The viruses vary in H and N surface proteins because

Correct AnswerverifiedShow Answer

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D

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B

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A

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Influenza strains that sweep around the world often carry names such as Shanghai H₁N₁ or Mexico City H₂N₂.The viruses vary in H and N surface proteins because

Correct Answer
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