Which one of the following is NOT an effect of fever?
A) Increases production of T cells.
B) Increases alpha interferon activity.
C) Increases transferrin production.
D) Kills pathogens.
E) Increases interleukin-1.
Ans: D) Kills pathogens.
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A mutation in the gene encoding the enzyme that cuts F factor DNA during conjugation would result in
A. an inability to separate the recipient DNA from the donor DNA. B. an inability to draw the conjugated cells close enough to allow DNA transfer. C. the transfer of single-stranded DNA instead of double-stranded DNA. D. the inability of the donor DNA to move through the pilus. E. the inability of the recipient cell to replicate the F factor after transfer.
The acid-fast stain is specifically designed for bacteria whose cell walls contain:
a. teichoic acids. b. mycolic acids. c. peptidoglycan. d. disaccharide-pentapeptide subunits.
Forming skill memories through repetition of an activity such as riding a bike, involves the ____, which controls motor activity
a. cerebellum b. medulla oblongata c. cerebrum d. hippocampus e. hypothalamus
This environment is characterized by high nutrient inputs and by relatively great fluctuations in
salinity and temperature:a. a river. b. an estuary. c. a freshwater wetland. d. a large lake. e. the oceanic province.