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Archaea Characteristics

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Questions and Answers

What is the shape of Archaea cells?

Only rectangular and square shapes

Various shapes, including spherical, rod, spiral, and others (correct)

Only single cells and filaments

Only spherical and rod-shaped

What is the primary source of energy for organotrophs, including humans?

Raw materials and energy

N2 fixation

CO2 fixation

Organic compounds (correct)

What is unique about the cell wall of Archaea?

It has a simple polysaccharide structure

It is composed of lipids only

It has a peptidoglycan structure and is similar to bacteria

It has a complex polysaccharide structure and lacks peptidoglycan (correct)

Where are Archaea typically found?

Only in extreme environments Signup and view all the answers

What is the role of Archaeoglobus fulgidus?

Souring oil wells Signup and view all the answers

What is the characteristic of Pyrolobus fumarii?

It can survive in extreme hot environments Signup and view all the answers

What is the characteristic of Pyrococcus furiosis?

It is the source of an extra-stable enzyme for PCR Signup and view all the answers

What is the primary metabolism of methanogens?

CO2 + 4 H2 → CH4 + 2 H2O Signup and view all the answers

What temperature range do hyperthermophilic Methanopyrus prefer?

84°C - 110°C Signup and view all the answers

Where can Sulphate Reducers typically be found?

Marine sediments Signup and view all the answers

What gas is produced during the metabolism of methanogens that can be used as fuel?

Methane (CH4) Signup and view all the answers

What characteristic do extreme halophiles require to grow?

High salt concentrations Signup and view all the answers

What is a key metabolic end product of extreme thermophiles?

Sulfuric acid (H2SO4) Signup and view all the answers

What do methanogens provide in addition to fuel?

Energy for warming houses and stoves Signup and view all the answers