The onset of AIDS is often accompanied by
A. a steep drop in T cell numbers.
B. macrophage infection.
C. a positive HIV test.
D. lung infections and other opportunistic infections.
E. Kaposi's sarcoma.
A. a steep drop in T cell numbers.
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In response to concerns about the safety of genetic engineering, scientists ________
a. were banned from continuing their research b. have relocated in great numbers to more lenient countries c. developed safety guidelines adopted by the National Institute of Health (NIH) d. made speeches assuring the public of the safety of GMOs
An oncogene is more likely to lead to cancer than a mutant tumor suppressor gene because
A) a gain of function mutation in an oncogene need only occur in one allele before it disrupts control of the cell cycle. B) a loss of function mutation in an oncogene is sufficient to cause unregulated cell division. C) the mutant oncogene may inactivate telomerase. D) a gain of function mutation in a tumor suppressor gene can promote the cell cycle. E) a gain of function mutation in an oncogene is more likely to cause the other allele to mutate.
Single layer of cube shaped cells
A. Pseudostratified columnar B. Simple columnar C. Simple cuboidal D. Simple squamous E. Stratified squamous F. Transitional
Functions of the glycocalyx include all of the following EXCEPT
A) biofilm formation. B) increased virulence. C) source of nutrition. D) protection against dehydration. E) binary fission.