The cytokine released from macrophages that seems to play a major role in endotoxic shock is

A. macrophage factor.
B. tumor necrosis factor.
C. protein A.
D. interferon.


B.

Biology & Microbiology

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What molecule will allow some bacteria to be resistant to many penicillins?

A. Imipenem B. Aztreonam C. Synercid D. Penicillinase E. Clavulanic acid

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Which of the following moves materials against a concentration gradient?

a. active transport b. dialysis c. facilitated diffusion d. simple diffusion e. osmosis

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The ____ contains the greatest volume of ocean water

a. oceanic province b. intertidal zone c. euphotic zone d. neritic province e. limnetic zone

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Rotation of the ________ subunit of ATP synthase causes conformational changes in the catalytic sites that produce ATP.

A) alpha B) beta C) gamma D) F0

Biology & Microbiology