Question 1

Archaeal promoters are most similar to those of

Accepted Answer

A) viruses. 
B) bacteria. 
C) eukaryotes. 
D) both viruses and bacteria. 
A) viruses. 
B) bacteria. 
C) eukaryotes. 
D) both viruses and bacteria.

Question 2

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) barophile. 
A) facultative halophile. 
B) extreme halophile. 
C) sodiophile. 
D) barophile.

Question 3

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

Question 4

Which of the following do methanogens not use to form methane?

Accepted Answer

A) carbon dioxide 
B) formate 
C) acetate 
D) phosphate 
A) carbon dioxide 
B) formate 
C) acetate 
D) phosphate

Question 5

The primary lipid components of the membranes of extreme thermophiles are

Accepted Answer

A) sulfolipids. 
B) cholesterol. 
C) 40 carbon diglycerol tetraethers. 
D) 20 carbon diglycerol diethers. 
A) sulfolipids. 
B) cholesterol. 
C) 40 carbon diglycerol tetraethers. 
D) 20 carbon diglycerol diethers.

Question 6

Substrates used by methanogens include H2 and CO2 as well as short-chain organic compounds such as

Accepted Answer

A) formate. 
B) acetate. 
C) methanol. 
D) all of the above are used by methanogens. 
A) formate. 
B) acetate. 
C) methanol. 
D) all of the above are used by methanogens.

Question 7

Archaeoglobales have been isolated from marine hydrothermal vents.

Accepted Answer

A) True 
 B)False

Question 8

Archaeons have been isolated from temperate and cold environments.

Accepted Answer

A) True 
 B)False

Question 9

Most Archaea capable of metabolizing glucose do so using a modified _________________ pathway.

Accepted Answer

The answer of Most Archaea capable of metabolizing glucose do...

Question 10

Unlike other prokaryotes,archaeons (except Sulfolobus)have two origins of replication.

Accepted Answer

A) True 
 B)False

Question 11

The Crenarchaeota and Euryarchaeota are

Accepted Answer

A) the two phyla of the Archaea. 
B) very closely related based on 16S rRNA comparisons. 
C) photosynthetic Archaea. 
D) now classified with the bacteria based on genomic sequence analysis. 
A) the two phyla of the Archaea. 
B) very closely related based on 16S rRNA comparisons. 
C) photosynthetic Archaea. 
D) now classified with the bacteria based on genomic sequence analysis.

Question 12

Autotrophy has been observed among the

Accepted Answer

A) methanogens. 
B) extreme thermophiles. 
C) cyanobacteria. 
D) all of the choices 
A) methanogens. 
B) extreme thermophiles. 
C) cyanobacteria. 
D) all of the choices

Question 13

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 these. 
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 these.

Question 14

Which of the following is currently the largest group of cultured Archaea?

Accepted Answer

A) extreme halophiles 
B) methanogens 
C) extreme thermophiles 
D) sulfate reducers 
A) extreme halophiles 
B) methanogens 
C) extreme thermophiles 
D) sulfate reducers

Question 15

Which of the following do methanogens not use to form methane?

Accepted Answer

A) carbon dioxide 
B) formate 
C) acetate 
D) phosphate 
A) carbon dioxide 
B) formate 
C) acetate 
D) phosphate

Question 16

Which of the following is true about the cell-wall-less archaeal genus Thermoplasma?

Accepted Answer

A) They are spherical at temperatures below 59$\degree$C. 
B) They are filamentous at temperatures at 59$\degree$C and higher. 
C) They are non-motile. 
D) They are spherical at temperatures below 59$\degree$C and they are filamentous at temperatures at 59$\degree$C and higher.
ASM 
A) They are spherical at temperatures below 59$\degree$C. 
B) They are filamentous at temperatures at 59$\degree$C and higher. 
C) They are non-motile. 
D) They are spherical at temperatures below 59$\degree$C and they are filamentous at temperatures at 59$\degree$C and higher.
ASM

Question 17

Diglycerol tetraether lipids

Accepted Answer

A) are a characteristic feature of thermophilic Archaea. 
B) tend to make the membrane less rigid. 
C) are found in some bacteria and some Archaea. 
D) form typical bilayer membranes in thermophilic Archaea of the genus Thermoplasma. 
A) are a characteristic feature of thermophilic Archaea. 
B) tend to make the membrane less rigid. 
C) are found in some bacteria and some Archaea. 
D) form typical bilayer membranes in thermophilic Archaea of the genus Thermoplasma.

Question 18

Some archaeons are symbionts in animal digestive tracts.

Accepted Answer

A) True 
 B)False

Exam 20: The Archaea

Archaeal promoters are most similar to those of

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

Methanogenic Archaea are

Which of the following do methanogens not use to form methane?

The primary lipid components of the membranes of extreme thermophiles are

Substrates used by methanogens include H2 and CO2 as well as short-chain organic compounds such as

Archaeoglobales have been isolated from marine hydrothermal vents.

Archaeons have been isolated from temperate and cold environments.

Most Archaea capable of metabolizing glucose do so using a modified _________________ pathway.

Unlike other prokaryotes,archaeons (except Sulfolobus)have two origins of replication.

The Crenarchaeota and Euryarchaeota are

Autotrophy has been observed among the

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

Which of the following is currently the largest group of cultured Archaea?

Which of the following do methanogens not use to form methane?

Which of the following is true about the cell-wall-less archaeal genus Thermoplasma?

Diglycerol tetraether lipids

Some archaeons are symbionts in animal digestive tracts.

The Evolution of Microorganisms and Microbiology

Microscopy

Bacterial Cell Structure

Archaeal Cell Structure

Eukaryotic Cell Structure

Viruses and Other Acellular Infectious Agents

Microbial Growth

Control of Microorganisms in the Environment

Antimicrobial Chemotherapy

Introduction to Metabolism

Catabolism: Energy Release and Conservation

Anabolism: the Use of Energy in Biosynthesis

Bacterial Genome Replication and Expression

Regulation of Bacterial Cellular Processes

Eukaryotic and Archaeal Genome Replication and Expression

Mechanisms of Genetic Variation

Recombinant Dna Technology

Microbial Genomics

Microbial Taxonomy and the Evolution of Diversity

The Deinococci,mollicutes,and Nonproteobacterial Gram-Negative Bacteria

The Proteobacteria

Firmicutes: the Low G 1 C Gram-Positive Bacteria

Actinobacteria: the High G 1 C Gram-Positive Bacteria

The Protists

The Fungi Eumycota

Viruses

Biogeochemical Cycling and Global Climate Change

Methods in Microbial Ecology

Microorganisms in Marine and Freshwater Ecosystems

Microorganisms in Terrestrial Ecosystems

Microbial Interactions

Innate Host Resistance

Adaptive Immunity

Pathogenicity and Infection

Clinical Microbiology and Immunology

Epidemiology and Public Health Microbiology

Human Diseases Caused by Viruses and Prions

Human Diseases Caused by Bacteria

Human Diseases Caused by Fungi and Protists

Microbiology of Food

Biotechnology and Industrial Microbiology

Applied Environmental Microbiology

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Substrates used by methanogens include H₂ and CO₂ as well as short-chain organic compounds such as