Question 1

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

Accepted Answer

A)  Halophiles 
B)  Methanogens 
C)  Thermoacidophiles 
D)  Cyanobacteria 
A)  Halophiles 
B)  Methanogens 
C)  Thermoacidophiles 
D)  Cyanobacteria

Question 2

Describe how halophiles metabolize nutrients in environments that contain a high salt concentration.

Accepted Answer

Halophiles require a high salt concentra

Question 3

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

Accepted Answer

A)  lysogenic 
B)  sexual 
C)  lytic 
D)  alternation of generations 
A)  lysogenic 
B)  sexual 
C)  lytic 
D)  alternation of generations

Question 4

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. 
A)  10-400 nm. 
B)  20-300 mm. 
C)  10-100 µm. 
D)  1-10 µm. 
E)  50-100nm.

Question 5

Which of these is the best description of a virus?

Accepted Answer

A)  a noncellular living organism 
B)  one of the smallest bacteria known 
C)  a member of the kingdom Virusae 
D)  a cell at the boundary between living and nonliving things 
E)  chemical complexes of RNA or DNA protected by protein shell 
A)  a noncellular living organism 
B)  one of the smallest bacteria known 
C)  a member of the kingdom Virusae 
D)  a cell at the boundary between living and nonliving things 
E)  chemical complexes of RNA or DNA protected by protein shell

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

Question 7

Which statement is true about prokaryotes? r: 0214_2014_QC_44908

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 long linear strand of DNA as the genetic material. 
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 long linear strand of DNA as the genetic material.

Question 8

The endosymbiotic theory suggests that chloroplasts evolved from cyanobacteria. What features of cyanobacteria support this premise.

Accepted Answer

There are many similarities between cyan

Question 9

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. 
A)  chicken eggs 
B)  cell culture 
C)  bacteria 
D)  All of the choices could be used.

Question 10

A virus that follows the lysogenic cycle can often be considered easier to manage. Explain why this is so.

Accepted Answer

Answers may vary. Lysogenic viruses are

Question 11

If a virus is latent, it

Accepted Answer

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

Question 12

All of the following are true of methanogens EXCEPT

Accepted Answer

A)  they produce methane from CO2 and H2. 
B)  they live in the intestinal tracts of cows, humans, and termites. 
C)  they live in swamps and marshes. 
D)  their biogas may contribute to global warming. 
E)  they are harmful human pathogens. 
A)  they produce methane from CO2 and H2. 
B)  they live in the intestinal tracts of cows, humans, and termites. 
C)  they live in swamps and marshes. 
D)  their biogas may contribute to global warming. 
E)  they are harmful human pathogens.

Question 13

Explain the biochemical features that are unique to archaea.

Accepted Answer

The archaea have a variety of unique fea

Question 14

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 environments 
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 environments

Question 15

Some, but not all, virus capsids are surrounded by _________.

Accepted Answer

A)  a membranous envelope 
B)  both DNA and RNA 
C)  either DNA or RNA 
D)  a protein capsid 
E)  a protein spore coat 
A)  a membranous envelope 
B)  both DNA and RNA 
C)  either DNA or RNA 
D)  a protein capsid 
E)  a protein spore coat

Question 16

A facultative anaerobe is an organism that can metabolize effectively in the presence or absence of oxygen.

Accepted Answer

A) True 
 B)False

Question 17

Halophiles

Accepted Answer

A)  require a high salt environment. 
B)  increase the chloride level within their cells. 
C)  may be chemoheterotrophs or photosynthetic. 
D)  all of the choices are correct. 
E)  use bacteriorhodopsin to capture solar energy. 
A)  require a high salt environment. 
B)  increase the chloride level within their cells. 
C)  may be chemoheterotrophs or photosynthetic. 
D)  all of the choices are correct. 
E)  use bacteriorhodopsin to capture solar energy.

Question 18

Bacterial cells pick up free pieces of DNA that were secreted by live bacteria or released from dead bacteria in their environment. This process is called

Accepted Answer

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

Question 19

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

Question 20

Imagine a researcher is trying to genetically engineer this virus so it attacks the lung cells of a human in order to "infect" the host with a particular gene to cure a genetic disorder. Explain which structure the researcher would be most interested in working with in order to get the virus to attack the lung cell of a human.

Accepted Answer

Answers may vary but should discuss that

Exam 20: Viruses, Bacteria, and Archaea

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

Describe how halophiles metabolize nutrients in environments that contain a high salt concentration.

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

Prokaryotes generally range in size from

Which of these is the best description of a virus?

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

Which statement is true about prokaryotes? r: 0214_2014_QC_44908

The endosymbiotic theory suggests that chloroplasts evolved from cyanobacteria. What features of cyanobacteria support this premise.

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

A virus that follows the lysogenic cycle can often be considered easier to manage. Explain why this is so.

If a virus is latent, it

All of the following are true of methanogens EXCEPT

Explain the biochemical features that are unique to archaea.

Which of the following is a mismatch?

Some, but not all, virus capsids are surrounded by _________.

A facultative anaerobe is an organism that can metabolize effectively in the presence or absence of oxygen.

Halophiles

Bacterial cells pick up free pieces of DNA that were secreted by live bacteria or released from dead bacteria in their environment. This process is called

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

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Photosynthesis

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The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

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How Populations Evolve

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Origin and History of Life

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Flowering Plants: Control of Growth Responses

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The Lymphatic and Immune Systems

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