Which amino acid is involved in the cross-linking found in insoluble collagen?
A) isoleucine
B) leucine
C) lysine
D) proline
C
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Qualitatively, what happens to the hydroxide ion concentration if you decrease the hydronium ion concentration?
A. The concentration of OH- increases, but the ratio stays the same. B. The concentration of OH- stays the same, but the ratio OH-/H3O+ changes. C. The concentration of OH- increases. D. none of the above
What months of the year are hurricanes most likely to form in the Atlantic Ocean?
A. June and July B. July and August C. August and September D. September and October
Most ocean surface currents are due to
A) melting polar glaciers. B) river flow into the ocean. C) global winds. D) local winds.
The Gateway Arch is a symbol of what city?
A) Chicago, Illinois B) Detroit, Michigan C) Youngstown, Ohio D) St. Louis, Missouri