A number of tumors and viruses (e.g., Epstein-Barr) are able to escape cytotoxic T cell degradation by inhibiting what?

A) helper T cell activation
B) tumor antigen expression
C) the production of the class I MHC molecule
D) the production of the class II major histocompatibility (MHC) molecule
E) the activation of the complement system


Ans: C) the production of the class I MHC molecule

Biology & Microbiology

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Asexual reproduction is indicated by letter

a. A. b. B. c. C. d. D. e. E.

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Answer the following questions true (T) or false (F)

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You cut down a tree and count 23 annual rings in the trunk. You conclude that the tree is

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