Retroviruses have a unique enzyme that
A. disintegrates host DNA.
B. polymerizes host DNA.
C. transcribes viral RNA to cDNA.
D. translates host DNA.
E. repairs viral DNA.
C. transcribes viral RNA to cDNA.
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Metronidazole is used to treat Entamoeba infections.
Answer the following statement true (T) or false (F)
Which of the following does NOT influence the pH
of extracellular fluids? a. respiration b. a high protein diet c. bicarbonate ions d. filtration by glomerulus e. phosphate and ammonia ions
What factors are found in both tropical and temperate forests?
A) rainy and dry seasons B) seasonal changes in temperature C) enough precipitation to support large trees D) the same species of trees
When molecules move through a cell membrane from an area of greater concentration to an area of lesser concentration by way of a channel protein, it is called:
A. endocytosis B. exocytosis C. facilitated diffusion D. osmosis E. simple diffusion