The MHC complex is a set of genes that

A. encodes cell recognition molecules.
B. is located on chromosome 6.
C. produces molecules to which antigens must attach in order to activate cell-mediated
immunity.
D. prevents the immune system from attacking the body's own tissues.
E. has all of these traits.


E

Biology & Microbiology

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To decrease air pollution created from sulfur emissions, your local power plant wishes to build tall smokestacks. The ultimate consequence of this would most likely be

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A (bacteriocidial/bacteriostatic/minimum) concentration of a drug is one at which microbes survive but are not able to grow and reproduce

What will be an ideal response?

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Which of the following is NOT a component of bacterial flagella?

A. flagellin B. basal body C. tubulin D. filament E. hook

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Prokaryotes reproducing by binary fission can increase genetic variation by (select all correct choices):

A. mutation. B. DNA transfer during conjugation. C. obtaining DNA from the environment. D. obtaining DNA through viral infection. E. exchange of genetic material between homologous chromosomes.

Biology & Microbiology