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.

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology