Question 1

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

Accepted Answer

A) True 
 B)False  False

Question 2

Most archaeal mRNAs like those of eukaryotes are spliced.

Accepted Answer

A) True 
 B)False  False

Question 3

Some members of the genus Pyrodictum can grow quite well above the boiling point of water.

Accepted Answer

A) True 
 B)False  True

Question 4

Some archaeons are symbionts in animal digestive tracts.

Accepted Answer

A) True 
 B)False

Question 5

Some methanogenic Archaea are capable of fixing nitrogen.

Accepted Answer

A) True 
 B)False

Question 6

Some members of the Archaea lack a cell wall.

Accepted Answer

A) True 
 B)False

Question 7

Thermophylic members of the phylum _____________ can grow in geothermally heated water or soils that contain elemental sulfur.

Accepted Answer

The answer of Thermophylic members of the phylum _____________ can...

Question 8

The cell membranes of wall-less archaeons are strengthened by

Accepted Answer

A)  diglycerol ethers. 
B)  glycoprotein or protein layers. 
C)  pseudomurein. 
D)  diglycerol tetraethers. 
A)  diglycerol ethers. 
B)  glycoprotein or protein layers. 
C)  pseudomurein. 
D)  diglycerol tetraethers.

Question 9

If the NaCl concentration drops below 1.5 M the cell walls of Halobacterium become more rigid.

Accepted Answer

A) True 
 B)False

Question 10

Archaeoglobales have been isolated from marine hydrothermal vents.

Accepted Answer

A) True 
 B)False

Question 11

Methanogens may contribute to the greenhouse effect and global warming due to methane production.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

The RNA polymerase enzymes of the Archaea are more similar to eukaryotic enzymes than to bacterial enzymes.

Accepted Answer

A) True 
 B)False

Question 14

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 15

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 16

Methanogens link ATP synthesis to methanogenesis by

Accepted Answer

A)  substrate-level phosphorylation. 
B)  the reverse TCA cycle. 
C)  the use of bacteriorhodopsin. 
D)  electron transport to generate proton motive force 
A)  substrate-level phosphorylation. 
B)  the reverse TCA cycle. 
C)  the use of bacteriorhodopsin. 
D)  electron transport to generate proton motive force

Question 17

Archaeal membranes contain which of the following lipids?

Accepted Answer

A)  phospholipids 
B)  sulfolipids 
C)  glycolipids 
D)  all of these 
A)  phospholipids 
B)  sulfolipids 
C)  glycolipids 
D)  all of these

Question 18

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 19

The Archaea generally lack which of the following that are normally found in gram-negative bacteria?

Accepted Answer

A)  outer membrane 
B)  a complex peptidoglycan network 
C)  lipopolysaccharide 
D)  all of the choices 
A)  outer membrane 
B)  a complex peptidoglycan network 
C)  lipopolysaccharide 
D)  all of the choices

Question 20

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.

Exam 18: The Archaea

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

Most archaeal mRNAs like those of eukaryotes are spliced.

Some members of the genus Pyrodictum can grow quite well above the boiling point of water.

Some archaeons are symbionts in animal digestive tracts.

Some methanogenic Archaea are capable of fixing nitrogen.

Some members of the Archaea lack a cell wall.

Thermophylic members of the phylum _____________ can grow in geothermally heated water or soils that contain elemental sulfur.

The cell membranes of wall-less archaeons are strengthened by

If the NaCl concentration drops below 1.5 M the cell walls of Halobacterium become more rigid.

Archaeoglobales have been isolated from marine hydrothermal vents.

Methanogens may contribute to the greenhouse effect and global warming due to methane production.

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

The RNA polymerase enzymes of the Archaea are more similar to eukaryotic enzymes than to bacterial enzymes.

Diglycerol tetraether lipids

Archaeal promoters are most similar to those of

Methanogens link ATP synthesis to methanogenesis by

Archaeal membranes contain which of the following lipids?

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

The Archaea generally lack which of the following that are normally found in gram-negative bacteria?

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

The Evolution of Microorganisms and Microbiology

The Study of Microbial Structure: Microscopy and Specimen Preparation

Bacteria and Archaea

Eukaryotic Cell Structure and Function

Viruses and Other Acellular Infectious Agents

Microbial Nutrition

Microbial Growth

Control of Microorganisms in the Environment

Introduction to Metabolism

Catabolism Energy Release and Conservation

Anabolism the Use of Energy in Biosynthesis

Genes Structure, Replication, and Expression

Microbial Genetics Regulation of Gene Expression

Microbial Genetics Mechanisms of Genetic Variation

Recombinant Dna Technology

Microbial Genomics

Microbial Taxonomy and the Evolution of Diversity

Bacteria the Deinococci and Nonproteobacteria Gram Negatives

Bacteria the Proteobacteria

Bacteria the Low G+C Gram Positives

Bacteria the High G+C Gram Positives

The Protists

The Fungi Eumycota

The Viruses

Biogeochemical Cycling

Methods in Microbial Ecology

Microorganisms in Marine and Freshwater Ecosystems

Microorganisms in Terrestrial Ecosystems

Microbial Interactions

Infection and Pathogenicity

Nonspecific Innate Host Resistance

Specific Adaptive Immunity

Antimicrobial Chemotherapy

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

Industrial Microbiology

Applied Environmental Microbiology

Filters

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