Question 1

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.F) A) and E)
G) C) and D)

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

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 B)
F) All of the above

Question 4

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 coatF) None of the above
G) B) and D)

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 shellF) B) and E)
G) A) and B)

Question 6

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.F) A) and E)
G) D) and E)

Question 7

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

Question 8

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) B) and D)
G) A) and D)

Question 9

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 10

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

Accepted Answer

A)   lysogenic
B)   sexual
C)   lytic
D)   alternation of generationsE) None of the above
F) All of the above

Question 11

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) A) and D)
G) B) and E)

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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 14

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.F) C) and D)
G) B) and E)

Question 15

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.F) A) and C)
G) D) and E)

Question 16

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) None of the above
F) All of the above

Question 17

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.F) B) and C)
G) D) and E)

Question 18

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...

Question 19

Explain the biochemical features that are unique to archaea.

Accepted Answer

The archaea have a variety of unique fea...

Question 20

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) All of the above
G) A) and B)

Exam 20: Viruses, Bacteria, and Archaea

Which of the following is a mismatch?

Correct Answer
verified

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

Correct Answer
verified

Which of these is the best description of a virus?

Correct Answer
verified

Prokaryotes generally range in size from

Correct Answer
verified

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

Correct Answer
verified
Halophiles require a high salt concentra...
View Answer

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

Correct Answer
verified

Correct Answer
verified
Answers may vary but should discuss that...
View Answer

If a virus is latent, it

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
There are many similarities between cyan...
View Answer

Which statement is true about prokaryotes? r: 0214_2014_QC_44908

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
Answers may vary. Lysogenic viruses are ...
View Answer

All of the following are true of methanogens EXCEPT

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Explain the biochemical features that are unique to archaea.

Correct Answer
verified
The archaea have a variety of unique fea...
View Answer

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

Correct Answer
verified

Halophiles

Correct Answer
verified

Exam 20: Viruses, Bacteria, and Archaea

Which of the following is a mismatch?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of these is the best description of a virus?

Correct AnswerverifiedShow Answer

Prokaryotes generally range in size from

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedHalophiles require a high salt concentra...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedAnswers may vary but should discuss that...View AnswerShow Answer

If a virus is latent, it

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThere are many similarities between cyan...View AnswerShow Answer

Which statement is true about prokaryotes? r: 0214_2014_QC_44908

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedAnswers may vary. Lysogenic viruses are ...View AnswerShow Answer

All of the following are true of methanogens EXCEPT

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

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

Correct AnswerverifiedShow Answer

Explain the biochemical features that are unique to archaea.

Correct AnswerverifiedThe archaea have a variety of unique fea...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Halophiles

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Halophiles require a high salt concentra...
View Answer

Correct Answer
verified

Correct Answer
verified
Answers may vary but should discuss that...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
There are many similarities between cyan...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Answers may vary. Lysogenic viruses are ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The archaea have a variety of unique fea...
View Answer

Correct Answer
verified

Correct Answer
verified