Which class of antibody is found in body secretions such as tears, saliva, and breast milk?
a. IgA
b. IgB
c. IgM
d. IgG
e. IgE
Answer: a. IgA
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Multiple sclerosis is brought about by
a. destruction of cells in the basal ganglia. b. a viral infection of the meninges. c. a buildup of amyloid protein in the brain. d. CSF buildup in the ventricles. e. progressive destruction of the myelin sheath in the CNS.
Reactions of photosynthesis The reactions of photosynthesis are summarized as
a) 6CO2 + 6H2O PictureC6H12O6 + 6O2. b) 6CO + 6H2O PictureC6H12O6 + 6H2O. c) 12CO2 + 6H2O PictureC12H12O6 + 6H2O. d) 6CO + 6H2O PictureC6H12O6 + 6O2. e) None of the answers are correct.
The high degree of molecular organization in living cells is:
a) greater in animals than it is in plants. b) attained and maintained as a consequence of the violation of the laws of physics. c) attained and maintained only as long as energy fuels the organization. d) stored as heat energy. e) achieved by the synthesis of carbon dioxide in green plants.