Which of the following statements about IL-12 is FALSE?

A) It activates macrophages.
B) It inhibits some tumor cells.
C) It activates the TH1 pathway.
D) It causes autoimmune diseases.
E) It causes TH cells to respond to HIV.


D

Biology & Microbiology

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The largest reservoir of carbon is

a. living organisms. b. oceans. c. sedimentary rocks. d. the soil.

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Biotech barnyard animals produce which of the

following human products? a. a protein that treats cystic fibrosis b. a protein that counters the effects of a heart attack c. interleukin-2 that triggers divisions of certain human immune cells d. a protein that treats blood-clotting disorders e. all of these

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Some invertebrates do not have special respiratory

organs and rely on __________ exchange, diffusion of gases across the body surface. Fill in the blank(s) with the appropriate word(s).

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Which structure is involved in the genetic exchange (conjugation) between cells?

a. capsule b. fimbria c. pilus d. porin

Biology & Microbiology