Persons infected with HIV often die of opportunistic diseases because
A. HIV can transduce other viruses into virulent strains.
B. HIV destroys T cells.
C. HIV binds to antibodies.
D. HIV is a retrovirus.
E. HIV mutates easily.
B. HIV destroys T cells.
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Fannie Hesse is credited with giving ________ the idea to use agar as a solidifying agent
A) Louis Pasteur B) Ferdinand Cohn C) Robert Koch D) Sergei Winogradsky
Which body defense is neutralized by the type III secretion system of Yersinia pestis?
A. Antibodies B. Complement C. Phagocytes D. TH cells E. Cytotoxic T cells
All of the following are true of the second law of thermodynamics EXCEPT:
(A) the amount of useful energy decreases. (B) spontaneous changes result in a more uniform distribution of energy. (C) all chemical reactions release more energy than they consume. (D) there is a natural tendency toward greater disorder of the organization of matter. (E) NONE of the above
Plaque assays are used for
A. evaluating the cancer-causing ability of a virus. B. determining the density of phage in a culture. C. the study of prions. D. cultivating viruses that cannot be grown any other way. E. counting the number of latent phages in a cell.