Which statement about cancer defense is FALSE?

a. Natural killer and T cytotoxic cells destroy cancer cells.
b. Cancer antigens stimulate a strong immune response.
c. Monoclonal antibodies can deliver toxic drugs to cancer cells.


d. T cells produce interleukins, which defend against cancer.
e. Macrophages produce tumor necrosis factor, which inhibits tumor growth.


b

Biology & Microbiology

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Which of the following is not a photosynthetic pigment?

A. Phycobilin B. Carotenoid C. Leukophyll D. Chlorophyll

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Major gene reshuffling takes place during

a. telophase I. b. metaphase I. c. anaphase I. d. metaphase II. e. anaphase II

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Our species emerged approximately:

A. 4 mya B. 2 mya C. 1 mya D. 150 kya E. 10 kya

Biology & Microbiology

Archaeal cell walls

A. are disrupted by treatment with lysozyme or penicillin. B. include orthomureine. C. are similar to those of Gram-negative bacteria. D. lack murein and D-amino acids.

Biology & Microbiology