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Biochemistry Objective Questions {  Water, pH and Macromolecules }



15. A compound that is capable of forming hydrogen bonds with water
A.is probably held together by noncovalent bonds
B.contains at least some polar covalent bonds
C.should act as a good buffer for acids and bases
D.does not dissolve well in water
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16.  A biological polymer contains alanine, tyrosine, and lysine. Which of the following will be true about this molecule?
A.DNA
B.Strong base
C.Phospholipid
D.Protein
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17. The effectiveness or capacity of a buffer solution can be affected by
A.molar concentration of the buffer components
B.concentration of the conjugate base to the weak acid
C.both (a) and (b)
D.temperature of buffer components
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18. Who discovered and described the blood groups (ABO) classification?
A.Theodor Kocher
B.Karl Landsteiner
C.Otto Warburg
D.Karl Hooper
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19. H2O and CH4 are both examples of
A.molecules
B.ions
C.ions
D.none of these
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20. Hydrogen bonds and hydrophilic interactions are types of
A.weak chemical bonds that hold together the atoms within a molecule
B.strong chemical bonds that hold together the atoms within a molecule
C.weak chemical bonds that link together separate molecules
D.strong chemical bonds that link together separate molecules
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21. A solution with pH = 5 is __________ than a solution with pH = 7.
A.2 times more basic
B.10 times more basic
C.10 times more acidic
D.100 times more acidic
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