Hot sulfur-rich environments associated with terrestrial sulfur-rich springs are called :

Hot sulfur-rich environments associated with terrestrial sulfur-rich springs are called
 
  A) acid-mine drainage.
  B) hydrothermal vents.
  C) solfataras.
  D) terrestrial volcanoes.

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Proteins known as ________ function to refold partially denatured proteins.
 
  A) histones
  B) chaperonins
  C) HU proteins
  D) histones and chaperonins

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The cytoplasmic membrane of Thermoplasma contains a lipopolysaccharide-like material called lipoglycan which
 
  A) behaves like peptidoglycan and creates a strong cell wall.
  B) forms a monolayer that stabilizes the cytoplasmic membrane.
  C) contains ether linkages.
  D) contains ether linkages and forms a monolayer that stabilizes the cytoplasmic membrane.

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Compatible solutes counteract the tendency of a cell to become
 
  A) buoyant in high ionic strength environments.
  B) hyperosmotic in low ionic strength environments.
  C) dehydrated in high ionic strength environments.
  D) viscous in low ionic strength environments.

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The ribosomes of Halobacterium require high ________ levels for stability and activity.
 
  A) KCl
  B) NaCl
  C) NaSO4
  D) acidic amino acids