A portion of a DNA molecule wound around a "bead" of histone protein is called a
A) cell cycle. B) nucleosome. C) spindle. D) centromere. E) furrow.
B
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A ______________ group consists of the most recent common ancestor and all of its descendants.
Fill in the blank(s) with the appropriate word(s).
Which of the following experimental techniques is not useful for generating protein interaction networks?
A. protein chips B. 2D gel electrophoresis C. immunoprecipitation D. "Rosetta stone" fusions E. two-hybrid analysis
Molecules or regions of molecules that readily interact with water are said to be ________, whereas molecules or regions of molecules that are insoluble in water or do not readily interact with water are said to be hydrophobic.
Fill in the blank(s) with the appropriate word(s).
Gastrulation produces
a. hollow balls of cells. b. embryos with germ layers. c. solid balls of cells. d. maternal messages. e. yolk.