During S phase, chromosomes are converted to what form?
A) chromatin B) karyotypes C) centrosomes D) sister chromatids
Answer: D
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Forms of the Ras protein found in tumors usually cause which of the following?
A) DNA replication to stop B) DNA replication to be hyperactive C) cell-to-cell adhesion to be nonfunctional D) cell division to cease E) excessive cell division
The coelacanth is an example of a species that
is in
a. isolation. b. stasis. c. change. d. turmoil. e. sympatry
An effective vaccine does all of the following
EXCEPT a. produce a mild case of the disease. b. stimulate the production of effector T cells. c. cause memory cells to be formed. d. stimulate the production of effector B cells. e. produce passive immunity.
Involves study designs used to answer why? and how?
a. analytic epidemiology b. descriptive epidemiology c. differential epidemiology d. none of the above