Where is oxygen reduced with respect to Complex IV of the electron transport chain?
A) In the matrix itself, but close to a portion of Complex IV that extends into the matrix.
B) Near the inner membrane space side of the membrane on the surface of Complex IV.
C) Near the matrix side of the membrane on the surface of Complex IV.
D) At a site buried in the protein, but connected to the transport of electrons by a line of water molecules.
E) Freely in the hydrophobic portion of the lipid bilayer.
D) At a site buried in the protein, but connected to the transport of electrons by a line of water molecules.
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The unique antigenic determinants of the 90 serotypes of Streptococcus pneumoniae are found
A) on the cell-surface M proteins. B) on the capsular polysaccharides. C) in the bacterial cell wall. D) in the inclusions in the periplasmic space.
In a classic experiment, Otto Loewi electrically stimulated the vagus nerve of a frog heart. He then took the fluid bathing the stimulated heart and applied it to a second frog heart. The beating rate of both hearts slowed down with this treatment. Based on this response, you can assume the nerve he stimulated was part of the
A. parasympathetic system. B. sympathetic system. C. somatic system. D. atrioventricular system. E. central nervous system.
Gene therapy has been successful in curing some individuals of autoimmune disorder and sickle cell
disease.
Indicate whether the statement is true or false.Human agriculture started about ______ years ago
a. 100 b. 1,000 c. 11,000 d. 110,000 e. 1,100,000