Elevations of which of the following antibodies may indicate a parasitic infection?
a. IgG
b. IgA
c. IgM
d. IgE
D
Each of the five different classes of antibodies has its distinctive molecular configuration and is involved in the immune reaction in a different way. IgE is usually associated with various para-sitic infections.
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The first evidence that the vasodilatory signal molecule was produced by ____ was reported in 1980
a. nitric oxide b. endothelial cells c. CO2 d. cardiac muscle cells e. platelets
The most common infectious disease in humans is ________.
A. dental caries B. diarrhea C. pharyngitis D. the common cold E. gastritis
Suppose a particular protein is produced in excess of the cell's needs. What kind of mechanism will intervene to stop
production? a. growth b. anabolic c. metabolic d. respiratory e. homeostatic
Which of the following are characteristics of the Calvin cycle?
A) Nitrogen is fixed into an organic form during the Calvin cycle. B) The Calvin cycle produces glucose as an end product. C) The Calvin cycle produces carbon dioxide and water. D) All these choices are correct E) The Calvin cycle requires light.