Which best describe the structure of complex II?
A) An L-shaped structure that spans the membrane and partially extends into the mitochondrial matrix.
B) A structure firmly anchored to the membrane by many ?-helices that span the lipid-bilayer.
C) Three identical multisubunit enzymes that associate to form a mushroom-shaped structure.
D) Has a core structure of three conserved subunits, one of which forms a ?-barrel on the exterior surface of the membrane.
C) Three identical multisubunit enzymes that associate to form a mushroom-shaped structure.
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The same biologist then takes a sample of acid mine drainage, and finds a new acidophilic archaeon species. Interestingly, these archaeons also require high-salt environments in order to survive. How should this organism be classified?
A. as a euryarchaeote archaeon B. as a crenarchaeote archaeon C. as a nanoarchaeote archaeon D. as a korarchaeote archaeon E. as a thaumarchaeote archaeon
Inheritance is the process by which genetic information is ____
a. transmitted to offspring in the form of RNA b. transmitted to offspring in the form of DNA c. transcribed from DNA into RNA d. transmitted to offspring in the form of proteins e. translated from RNA into proteins
Structural isomers differ from each other ____
a. in the arrangement of their covalent bonds b. in their molecular formulas c. by being mirror images that cannot be superimposed on each other d. by having double covalent bonds instead of single bonds e. by having different atomic isotopes in their molecules
Which of the following is NOT typically found in primary plant cell walls?
a. lignin b. hemicelluloses c. pectin d. cellulose e. chitin