What type of chemical bond joins the bases of complementary DNA strands?
A) ionic
B) covalent
C) hydrophilic
D) hydrogen
D
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ATP is a nucleotide composed of adenine ____ , and three phosphate groups
Fill in the blank with the appropriate word.
Liver cells, mammary cells, and skin cells all contain the same genome; however, their respective proteomes vary drastically. This observation is best explained by what phenomenon?
A. gene splicing B. cell division C. cell differentiation D. crossing over E. evolution
Autoimmune diseases and immunodeficiencies are studied and treated by immunopathologists.
Answer the following statement true (T) or false (F)
People living in the northeastern United States are more at risk for exposure to which of the following rickettsias?
A) Rickettsia rickettsii B) Rickettsia typhi C) Ehrlichia chaffeensis D) Orientia tsutsugamushi E) Rickettsia prowazekii