The two macronutrients necessary for the production of ATP are
a. calcium and iron.
b. calcium and phosphorus.
c. phosphorus and nitrogen.
d. phosphorus and potassium
C
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In opsonization with IgG, why would it be important that IgG react with the antigen BEFORE a phagocytic cell recognizes the antibody molecule?
A. If the IgG is bound to the phagocyte BEFORE opsonization, it would most likely be ingested by the phagocyte before it could bind to a pathogen (it would be "naked," so to speak). B. Binding of IgG by phagocytes would block the antigen binding sites on the IgG molecules, preventing them from binding to the microbes. C. Binding of IgG by phagocytes changes their conformation-and by changing their protein conformation, their antigen binding sites are changed and they can no longer recognize their specific antigenic epitopes. D. Binding of antibody by phagocytes results in immediate release of protein-destroying enzymes to the outside of the cell. Since antibodies are proteins, they would be destroyed by these enzymes (and would then be unable to bind to their specific antigenic epitopes).
In the model of a bacteriorhodopsin, which pigment is bound to the protein?
a. rhodopsin b. retinal c. chlorophyll a d. indigo
This foramen lies between the temporal and occipital bones on the inferior surface of the skull. A major vein and several cranial nerves pass through it.
What will be an ideal response?
When microbes in close nutritional relationship and one benefits but the other is not harmed, it is called
A) Symbiosis B) Commensalism C) Synergism D) Mutualism E) Satellitism