The factor that MOST affects the thermostability of a protein is its
A) highly hydrophobic core regions.
B) folding pattern.
C) ionic surface interactions.
D) number of hydrogen bonds.
Many hyperthermophiles of Archaea are ________; however, Staphylothermus is a chemoorganotroph.
A) chemolithotrophs
B) mixotrophs
C) parasites
D) photoheterotrophs
________ is a strict anaerobe with an optimum growth temperature of 105 C that grows chemolithotrophically on H2 with S0 as an electron receptor or chemoorganotrophically on complex mixtures of organic compounds.
A) Pyrodictium
B) Pyrolobus
C) Pyrobaculum
D) Desulfurococcus
Which archaeal phylum contains primarily extreme halophiles and methanogens?
A) Crenarchaeota
B) Euryarchaeota
C) Nanoarchaeota
D) Thaumarchaeota
Which of the following is TRUE about the crenarchael genera Sulfolobus?
A) Sulfolobus grows in sulfur-rich hot alkaline springs.
B) Sulfolobus is an anaerobic chemolithotroph.
C) Sulfolobus can grow chemoorganotrophically.
D) Sulfolobus is a gram-positive rod.