C HAPTER 17: D IVERSITY OF A RCHAEA
Test Bank for Brock Biology of Microorganism 16th Edition by Michael T.
Madigan
17.1 Multiple Choice Questions
1. The microorganisms that are thought to resemble the first cellular forms
of life on Earth are
A) H2-oxidizing hyperthermophiles.
B) acidophilic
C) the Nanoarchaeota.
D) fermentative thermophiles.
2. Which of the following t ypes of metabolisms is NOT found in Archaea?
A) photosynthesis
B) chemolithotrophy
C) chemoorganotrophy
D) aerobic respiration
3. Most haloarchaea use which of the following for electron donors?
A) amino and organic acids
B) carbohydrates
C) lipids
D) nucleic acids
4. Some strains of haloarchaea exh ibit
A) anoxic growth at the expense of sugar fermentation.
B) anaerobic respiration.
C) anox ygenic photosynthesis.
, D) light-driven ATP synthesis under ox ygen -limiting conditions.
5. The cytoplasmic proteins of Halobacterium are
A) highl y acidic.
B) highl y basic.
C) generall y neutral.
D) variable, depending on the species.
6. Retinal in prokaryotes is part of
A) photosynthesis.
B) phototaxis.
C) light-driven ATP synthesis.
D) light-driven ATP synthesis and phototaxis.
7. Methanogens
A) produce methane as a part of their energy metaboli sm.
B) utilize methane as an energy source.
C) process and store methane to detoxify it.
D) produce, utilize, and detoxify methane.
8. What special adaptation(s) has/have Thermoplasma evolved to survive in
hot acidic environments?
A) Thermoplasma stabilize their cytoplasmic membrane by incorporation
of tetraether lipogl ycans in the cytoplasmic membrane.
B) Thermoplasma have a reinforced cell wall containing basic amino
linkers in the peptidogl ycan.
C) Thermoplasma excrete hydrogen ions and import hydrox yl ions.
D) Thermoplasma are highl y motile to avoid destruction.
9. What makes the metabolism of Ferroglobus interesting in the context of
evolution?
, A) Ferroglobus is an anaerobic iron -oxidizing chemolithotrophic
autotroph that may represent a key metabolism that allowed for t he
oxidation of ferrous iron without molecular ox ygen.
B) Ferroglobus can use H2 or H2S as electron acceptors in its energy
metabolism and is thermophilic, thus representing the earliest
hypothesized forms of life.
C) Ferroglobus lacks cell walls and becomes e ncrusted in oxidized iron,
suggesting that it may be an ancestor of other archaeans that lack cell
walls.
D) Ferroglobus is both an iron - and nitrate-reducer and is probably the
last common ancestor of all iron - and nitrate-reducing organisms.
10.Cellular integrit y and cell wall stabilization of the Halobacterium are
aided by
A) potassium ions.
B) chloride ions.
C) magnesium ions.
D) sodium ions.
11.Halobacterium salinarum and certain other extreme halophiles carry out
light-driven synthesis of ATP under what condition ?
A) low oxygen concentrations
B) low light
C) high oxygen concentrations
D) high carbon dioxide concentrations
12.Laboratory isolation of Nanoarchaeum equitans requires the presence of
A) fatt y acids.
B) oxygen.
C) Ignicoccus.
D) sunlight.
Test Bank for Brock Biology of Microorganism 16th Edition by Michael T.
Madigan
17.1 Multiple Choice Questions
1. The microorganisms that are thought to resemble the first cellular forms
of life on Earth are
A) H2-oxidizing hyperthermophiles.
B) acidophilic
C) the Nanoarchaeota.
D) fermentative thermophiles.
2. Which of the following t ypes of metabolisms is NOT found in Archaea?
A) photosynthesis
B) chemolithotrophy
C) chemoorganotrophy
D) aerobic respiration
3. Most haloarchaea use which of the following for electron donors?
A) amino and organic acids
B) carbohydrates
C) lipids
D) nucleic acids
4. Some strains of haloarchaea exh ibit
A) anoxic growth at the expense of sugar fermentation.
B) anaerobic respiration.
C) anox ygenic photosynthesis.
, D) light-driven ATP synthesis under ox ygen -limiting conditions.
5. The cytoplasmic proteins of Halobacterium are
A) highl y acidic.
B) highl y basic.
C) generall y neutral.
D) variable, depending on the species.
6. Retinal in prokaryotes is part of
A) photosynthesis.
B) phototaxis.
C) light-driven ATP synthesis.
D) light-driven ATP synthesis and phototaxis.
7. Methanogens
A) produce methane as a part of their energy metaboli sm.
B) utilize methane as an energy source.
C) process and store methane to detoxify it.
D) produce, utilize, and detoxify methane.
8. What special adaptation(s) has/have Thermoplasma evolved to survive in
hot acidic environments?
A) Thermoplasma stabilize their cytoplasmic membrane by incorporation
of tetraether lipogl ycans in the cytoplasmic membrane.
B) Thermoplasma have a reinforced cell wall containing basic amino
linkers in the peptidogl ycan.
C) Thermoplasma excrete hydrogen ions and import hydrox yl ions.
D) Thermoplasma are highl y motile to avoid destruction.
9. What makes the metabolism of Ferroglobus interesting in the context of
evolution?
, A) Ferroglobus is an anaerobic iron -oxidizing chemolithotrophic
autotroph that may represent a key metabolism that allowed for t he
oxidation of ferrous iron without molecular ox ygen.
B) Ferroglobus can use H2 or H2S as electron acceptors in its energy
metabolism and is thermophilic, thus representing the earliest
hypothesized forms of life.
C) Ferroglobus lacks cell walls and becomes e ncrusted in oxidized iron,
suggesting that it may be an ancestor of other archaeans that lack cell
walls.
D) Ferroglobus is both an iron - and nitrate-reducer and is probably the
last common ancestor of all iron - and nitrate-reducing organisms.
10.Cellular integrit y and cell wall stabilization of the Halobacterium are
aided by
A) potassium ions.
B) chloride ions.
C) magnesium ions.
D) sodium ions.
11.Halobacterium salinarum and certain other extreme halophiles carry out
light-driven synthesis of ATP under what condition ?
A) low oxygen concentrations
B) low light
C) high oxygen concentrations
D) high carbon dioxide concentrations
12.Laboratory isolation of Nanoarchaeum equitans requires the presence of
A) fatt y acids.
B) oxygen.
C) Ignicoccus.
D) sunlight.
