Question 1

Which of the following is unique to archaea?

Accepted Answer

A)  pseudopeptidoglycan 
B)  S-layers 
C)  supercoiled DNA 
D)  infection by double-stranded DNA viruses 
E)  methanotrophs 
A)  pseudopeptidoglycan 
B)  S-layers 
C)  supercoiled DNA 
D)  infection by double-stranded DNA viruses 
E)  methanotrophs

Question 2

Which of the following influences the fermentation efficiency of the gut flora?

Accepted Answer

A)  pathogens 
B)  bacteria 
C)  eukarya 
D)  methanogens 
E)  halophiles 
A)  pathogens 
B)  bacteria 
C)  eukarya 
D)  methanogens 
E)  halophiles

Question 3

Commercial evaporation pools for salt production benefit from the presence of red ________, whose light absorption accelerates heating and evaporation.

Accepted Answer

A)  methanogens 
B)  Sulfolobus 
C)  acidophiles 
D)  haloarchaea 
E)  thermophiles 
A)  methanogens 
B)  Sulfolobus 
C)  acidophiles 
D)  haloarchaea 
E)  thermophiles

Question 4

Which of the following coenzymes is NOT specific for methanogenesis?

Accepted Answer

A)  methanofuran (MFR) 
B)  tetrahydromethanopterin (H4MPT) 
C)  cofactor F420 (F420) 
D)  nicotinamide adenine dinucleotide (NAD+) 
E)  coenzyme M (CoM) 
A)  methanofuran (MFR) 
B)  tetrahydromethanopterin (H4MPT) 
C)  cofactor F420 (F420) 
D)  nicotinamide adenine dinucleotide (NAD+) 
E)  coenzyme M (CoM)

Question 5

Discuss the genome and morphology of known archaeal viruses. Why are their genomes all similar in structure?

Accepted Answer

All known archaeal viruses have double-s

Question 6

Which of the following is a glycerol diphytanyl diether containing a six-membered cyclic ring?

Accepted Answer

A)  Crenarchaeol 
B)  Euryarchaeol 
C)  Nanoarchaeol 
D)  Korarchaeol 
E)  Methanoarchaeol 
A)  Crenarchaeol 
B)  Euryarchaeol 
C)  Nanoarchaeol 
D)  Korarchaeol 
E)  Methanoarchaeol

Question 7

Describe some of the unique metabolic pathways found in archaea but not bacteria or eukarya.

Accepted Answer

Answers may vary. Some archaea use uniqu

Question 8

The exceptionally small cell in the image shown below is an obligate symbiont to another archaeon and a member of the genus

Accepted Answer

A)  Archaeoglobus. 
B)  Ignicoccus. 
C)  Pyrococcus. 
D)  Ferroplasma. 
E)  Nanoarchaeum. 
A)  Archaeoglobus. 
B)  Ignicoccus. 
C)  Pyrococcus. 
D)  Ferroplasma. 
E)  Nanoarchaeum.

Question 9

The Haloarchaea, extreme ________, are the only form of life to grow in concentrated brine.

Accepted Answer

A)  thermophiles 
B)  psychrophiles 
C)  methanophiles 
D)  halophiles 
E)  acidophiles 
A)  thermophiles 
B)  psychrophiles 
C)  methanophiles 
D)  halophiles 
E)  acidophiles

Question 10

In the haloarchaea, the red pigment bacterioruberin protects cells from damage by

Accepted Answer

A)  light. 
B)  salt. 
C)  heat. 
D)  acid. 
E)  cold. 
A)  light. 
B)  salt. 
C)  heat. 
D)  acid. 
E)  cold.

Question 11

Archaeoglobus fulgidus conserves energy by sulfate respiration, which drives a unique acetyl-CoA degradation pathway involving the reversal of

Accepted Answer

A)  methanogenesis. 
B)  glycolysis. 
C)  flagella rotation. 
D)  the TCA cycle. 
E)  electron transport. 
A)  methanogenesis. 
B)  glycolysis. 
C)  flagella rotation. 
D)  the TCA cycle. 
E)  electron transport.

Question 12

The Sulfolobales includes species that respire by oxidizing

Accepted Answer

A)  sulfate. 
B)  carbon dioxide. 
C)  ammonia. 
D)  methane. 
E)  sulfur. 
A)  sulfate. 
B)  carbon dioxide. 
C)  ammonia. 
D)  methane. 
E)  sulfur.

Question 13

Nitrosopumilus maritimus is able to oxidize

Accepted Answer

A)  nitrate. 
B)  ammonia. 
C)  sulfide. 
D)  sulfate. 
E)  methane. 
A)  nitrate. 
B)  ammonia. 
C)  sulfide. 
D)  sulfate. 
E)  methane.

Question 14

Which of the following is an extreme acidophile found anchored to deposits of pyrite ore in mines?

Accepted Answer

A)  Thermus aquaticus 
B)  Pyrococcus abyssi 
C)  Ferroplasma acidarmanus 
D)  Picrophilus torridus 
E)  Thermoplasma acidophilum 
A)  Thermus aquaticus 
B)  Pyrococcus abyssi 
C)  Ferroplasma acidarmanus 
D)  Picrophilus torridus 
E)  Thermoplasma acidophilum

Question 15

All types of methanogenesis are poisoned by ________ and therefore require extreme ________.

Accepted Answer

A)  carbon dioxide; aerobiosis 
B)  oxygen; anaerobiosis 
C)  heat; cold 
D)  pressure; vacuum 
E)  high salinity; freshwater 
A)  carbon dioxide; aerobiosis 
B)  oxygen; anaerobiosis 
C)  heat; cold 
D)  pressure; vacuum 
E)  high salinity; freshwater

Question 16

Why are the archaea so difficult to classify?

Accepted Answer

Most archaea are uncultured and known so

Question 17

What are methane gas hydrates and where are they found? Discuss the idea of benthic mining.

Accepted Answer

Psychrophilic marine methanogens grow at

Question 18

What is the Ancient Archaeal Group and what is known about these organisms?

Accepted Answer

This is a deeply branching division of h

Question 19

Where are methanogens found in nature? What are some of the problems they can cause in these habitats?

Accepted Answer

Methanogens are found in wetland soil an

Question 20

Why has Sulfolobus been studied so much more extensively than many archaea, and what is known about it?

Accepted Answer

Sulfolobus has been extensively studied

Exam 19: Archaeal Diversity

Which of the following is unique to archaea?

Which of the following influences the fermentation efficiency of the gut flora?

Commercial evaporation pools for salt production benefit from the presence of red ________, whose light absorption accelerates heating and evaporation.

Which of the following coenzymes is NOT specific for methanogenesis?

Discuss the genome and morphology of known archaeal viruses. Why are their genomes all similar in structure?

Which of the following is a glycerol diphytanyl diether containing a six-membered cyclic ring?

Describe some of the unique metabolic pathways found in archaea but not bacteria or eukarya.

The exceptionally small cell in the image shown below is an obligate symbiont to another archaeon and a member of the genus

The Haloarchaea, extreme ________, are the only form of life to grow in concentrated brine.

In the haloarchaea, the red pigment bacterioruberin protects cells from damage by

Archaeoglobus fulgidus conserves energy by sulfate respiration, which drives a unique acetyl-CoA degradation pathway involving the reversal of

The Sulfolobales includes species that respire by oxidizing

Nitrosopumilus maritimus is able to oxidize

Which of the following is an extreme acidophile found anchored to deposits of pyrite ore in mines?

All types of methanogenesis are poisoned by ________ and therefore require extreme ________.

Why are the archaea so difficult to classify?

What are methane gas hydrates and where are they found? Discuss the idea of benthic mining.

What is the Ancient Archaeal Group and what is known about these organisms?

Where are methanogens found in nature? What are some of the problems they can cause in these habitats?

Why has Sulfolobus been studied so much more extensively than many archaea, and what is known about it?

Microbial Life: Origin and Discovery

Observing the Microbial Cell

Cell Structure and Function

Bacterial Culture, Growth, and Development

Environmental Influences and Control of Microbial Growth

Viruses

Genomes and Chromosomes

Transcription, Translation, and Bioinformatics

Gene Transfer, Mutations, and Genome Evolution

Molecular Regulation

Viral Molecular Biology

Biotechniques and Synthetic Biology

Energetics and Catabolism

Electron Flow in Organotrophy, Lithotrophy, and Phototrophy

Biosynthesis

Food and Industrial Microbiology

Origins and Evolution

Bacterial Diversity

Eukaryotic Diversity

Microbial Ecology

Microbes in Global Elemental Cycles

Human Microbiota and Innate Immunity

The Adaptive Immune Response

Microbial Pathogenesis

Microbial Diseases

Antimicrobial Therapy

Clinical Microbiology and Epidemiology

Filters

All types of methanogenesis are poisoned by and therefore require extreme .