The somatic hypermutation (SHM) that contributes to immunoglobulin diversity is similar to the process of
a. resolution of a Holliday junction.
b. class switch DNA recombination (CSR).
c. somatic recombination.
d. double-strand break repair.
e. nonhomologous end-joining.
Ans: b
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If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the other complementary strand would have the sequence _____
A) 5'TAACGT3' B) 5'TGCAAT3' C) 5'UAACGU3' D) 3'UAACGU5' E) 5'UGCAAU3'
The sensors in the brainstem breathing control centers respond primarily to the concentration of
A. oxygen. B. carbon dioxide. C. bicarbonate ions. D. hemoglobin. E. hydrogen ions.
The root-shoot axis of plants
A. is determined by the orientation of the first zygotic cell division. B. is determined by sunlight, as roots grow away from the sun and shoot grow towards the sun. C. is determined by three axes. D. develops in segments. E. None of these are correct.
A new species of mouse is discovered that can sprint extraordinarily rapidly but also fatigues quickly. How would you expect its muscle composition to compare to that of an ordinary house mouse?
A. more fast glycolytic fibers B. more fast oxidative fibers C. more slow oxidative fibers D. fewer fast glycolytic fibers E. more slow glycolytic fibers