The two domains of prokaryotes are Bacteria and Fungi
__________________ Indicate whether the statement is true or false.
False - Archaea
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If you wished to study the SOS response in Escherichia coli, which of the following experimental procedures could be used?
A. Inactivate genes that encode DNA polymerases. B. Expose cells to ionizing radiation for 10 minutes. C. Transfer log phase cells from complete medium to thymine minimal medium. D. Expose cells to nonionizing radiation for 20 minutes. E. All of the choices are correct.
Attributes of an organism that promote pathogenicity are called
A. disease factors. B. colonization factors. C. mutualistic. D. virulence factors.
Which animal in not a natural host for E. coli O157:H7?
a. Goats b. Deer c. Humans d. Sheep e. Cows
Class II MHC genes code for
A. all HLA antigens. B. certain secreted complement components. C. receptors located primarily on macrophages and B cells. D. self receptors recognized by T lymphocytes. E. All of the choices are correct.