Which of the following holds the complementary base pairs of DNA together?
A) covalent bonds
B) dipole-dipole interactions
C) hydrogen bonds
D) ionic bonds
C
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Sinusoidal projections operate based on the premise that
A. distortion should be minimized in polar areas and maximized in equatorial areas. B. the map can be interrupted in areas that are not important to show on a particular map, and distortion can be minimized in areas that are more important to show accurately. C. the globe is projected onto a cone, with minimized distortion along the arc or arcs where the cone intersects with the globe. D. parallels of latitude and meridians of longitude should intersect at right angles.
Which of the following occurs when a sulfur atom is converted to S2-?
A) The sulfur atom gains two electrons and loses two protons. B) The sulfur atom gains two electrons. C) The sulfur atom loses two electrons and two protons. D) The sulfur loses two electrons.
Which of the following amino acids is missing from gelatin?
A) lysine B) tryptophan C) valine D) None, gelatin is a complete protein.
How would both a Mercator and a Gnomonic map be used together in navigation?
On a globe, use a piece of string to find the shortest path between Yokohama, Japan (near Tokyo) and San Francisco. This path is a “great circle” path. Two maps are shown here, a Gnomonic (i) and a Mercator (ii).
