Question 1

A peptidoglycan-like polymer found in the cell walls of some Archaea is called __________.

Accepted Answer

The answer of A peptidoglycan-like polymer found in the cell...

Question 2

A modified cell membrane that carries out photosynthesis using bacteriorhodopsin in the absence of chlorophyll is called a _______ membrane.

Accepted Answer

A)  colorless
B)  orange
C)  purple
D)  greenE) A) and B)
F) A) and C)

Question 3

Most Archaea capable of metabolizing glucose do so using a modified _________ -________ pathway.
or

Accepted Answer

Entner-Dou...

Question 4

Autotrophy has been observed among the ______.

Accepted Answer

A)  methanogens
B)  extreme thermophiles
C)  cyanobacteria
D)  All of the choices are correct.E) B) and C)
F) None of the above

Question 5

Microbes called the group I archaea or mesophilic Crenarchaeota that were found to oxidize ammonia in marine environments are now placed in the phylum ________.

Accepted Answer

A)  Thaumarchaeota
B)  Crenarchaeota II
C)  Korarchaeota
D)  EuryarchaeotaE) A) and B)
F) A) and C)

Question 6

Archaeons are not known to incorporate (fix)carbon dioxide.

Accepted Answer

A) True 
 B)False

Question 7

Archaeoglobales have been isolated from marine hydrothermal vents.

Accepted Answer

A) True 
 B)False

Question 8

Methanogenic Archaea are

Accepted Answer

A)  obligate anaerobes that produce methane.
B)  obligate anaerobes that consume methane.
C)  obligate aerobes that produce methane.
D)  obligate aerobes that consume methane.E) C) and D)
F) B) and C)

Question 9

The cell membranes of wall-less archaeons are strengthened by _______.

Accepted Answer

A)  diglycerol ethers
B)  glycoprotein or protein layers
C)  pseudomurein
D)  diglycerol tetraethersE) A) and D)
F) B) and C)

Question 10

Some methanogenic Archaea are capable of fixing nitrogen.

Accepted Answer

A) True 
 B)False

Question 11

An organism that requires at least 1.5 M NaCl in order to grow is referred to as a(n) ______.

Accepted Answer

A)  facultative halophile
B)  extreme halophile
C)  sodiophile
D)  barophileE) A) and D)
F) A) and C)

Question 12

Methanogenic Archaea are

Accepted Answer

A)  obligate anaerobes that produce methane.
B)  obligate anaerobes that consume methane.
C)  obligate aerobes that produce methane.
D)  obligate aerobes that consume methane.E) B) and D)
F) A) and D)

Question 13

The metabolic feature that defines Thaumarchaeota is _______ _______.

Accepted Answer

ammonia fixation amm...

Question 14

Some members of the Archaea lack a cell wall.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following contribute(s) to the differences between the Archaea and the bacteria?

Accepted Answer

A)  Archaea lack muramic acid.
B)  Archaea have isopranyl glycerol ethers rather than fatty acid esters in their membrane lipids.
C)  Archaea differ from bacteria in their tRNA composition,ribosome structure,and antibiotic sensitivity.
D)  All of the choices are correct.E) C) and D)
F) A) and D)

Question 16

Caldarchaeol lipids are extremely thermostable tetraethers found in many _______.

Accepted Answer

A)  hyperthermophilic archaea
B)  hypersalinic archaea
C)  psychrophile archaea
D)  autotrophic archaeaE) B) and C)
F) All of the above

Question 17

An organism with a temperature growth optimum near 80 ∘\circ∘ C and a pH growth optimum between two and three is usually referred to as a(n) ______.

Accepted Answer

A)  halophile
B)  thermoacidophile
C)  thermophile
D)  thermoalkalophile E) A) and B)
F) B) and C)

Question 18

Most euryarchaea,except the class Archaeoglobi and the order Archaeoglobales,reduce sulfur during anaerobic respiration by using sulfate as a terminal electron acceptor.

Accepted Answer

A) True 
 B)False

Question 19

Methanogens can live only in __________ environments.

Accepted Answer

A)  aerobic
B)  anaerobic
C)  microaerophilic
D)  All of the choices are correct.E) A) and D)
F) B) and C)

Question 20

The DNA of some archaeons is stabilized by association with archaeal histone proteins forming particles resembling eukaryotic nucleosomes.

Accepted Answer

A) True 
 B)False

Exam 20: Archaea

Autotrophy has been observed among the ______.

Correct AnswerverifiedShow Answer

Microbes called the group I archaea or mesophilic Crenarchaeota that were found to oxidize ammonia in marine environments are now placed in the phylum ________.

Correct AnswerverifiedShow Answer

Caldarchaeol lipids are extremely thermostable tetraethers found in many _______.

Correct AnswerverifiedShow Answer

The cell membranes of wall-less archaeons are strengthened by _______.

Correct AnswerverifiedShow Answer

Some methanogenic Archaea are capable of fixing nitrogen.

Correct AnswerverifiedShow Answer

The DNA of some archaeons is stabilized by association with archaeal histone proteins forming particles resembling eukaryotic nucleosomes.

Correct AnswerverifiedShow Answer

An organism with a temperature growth optimum near 80 ∘\circ∘ C and a pH growth optimum between two and three is usually referred to as a(n) ______.

Correct AnswerverifiedShow Answer

An organism that requires at least 1.5 M NaCl in order to grow is referred to as a(n) ______.

Correct AnswerverifiedShow Answer

A peptidoglycan-like polymer found in the cell walls of some Archaea is called __________.

Correct AnswerverifiedShow Answer

Archaeoglobales have been isolated from marine hydrothermal vents.

Correct AnswerverifiedShow Answer

Methanogenic Archaea are

Correct AnswerverifiedShow Answer

Most Archaea capable of metabolizing glucose do so using a modified _________ -________ pathway. or

Correct AnswerverifiedEntner-Dou...View AnswerShow Answer

Methanogenic Archaea are

Correct AnswerverifiedShow Answer

Methanogens can live only in __________ environments.

Correct AnswerverifiedShow Answer

The metabolic feature that defines Thaumarchaeota is _______ _______.

Correct Answerverifiedammonia fixation amm...View AnswerShow Answer

A modified cell membrane that carries out photosynthesis using bacteriorhodopsin in the absence of chlorophyll is called a _______ membrane.

Correct AnswerverifiedShow Answer

Most euryarchaea,except the class Archaeoglobi and the order Archaeoglobales,reduce sulfur during anaerobic respiration by using sulfate as a terminal electron acceptor.

Correct AnswerverifiedShow Answer

Which of the following contribute(s) to the differences between the Archaea and the bacteria?

Correct AnswerverifiedShow Answer

Archaeons are not known to incorporate (fix)carbon dioxide.

Correct AnswerverifiedShow Answer

Some members of the Archaea lack a cell wall.

Correct AnswerverifiedShow Answer

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An organism with a temperature growth optimum near 80^$\circ$C and a pH growth optimum between two and three is usually referred to as a(n) ______.

Correct Answer
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Most Archaea capable of metabolizing glucose do so using a modified _ - pathway. or

Correct Answer
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Entner-Dou...
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The metabolic feature that defines Thaumarchaeota is _ _.

Correct Answer
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ammonia fixation amm...
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