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Water, pH and Macromolecules

Water, pH and Macromolecules
Which of the following organic groups are found in naturally occuring amino acids?

Imidazole
Guanidinium ion
Indole
All of these

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Water, pH and Macromolecules
Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.

ionic
noncovalent
hydrogen
covalent

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Water, pH and Macromolecules
A compound that is capable of forming hydrogen bonds with water

should act as a good buffer for acids and bases
contains at least some polar covalent bonds
does not dissolve well in water
is probably held together by noncovalent bonds

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Water, pH and Macromolecules
The dissociation constant of H2O at 25° C is

107 M
10-14 M
10-7 M
1014 M

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Water, pH and Macromolecules
The pH of a solution is determined by

dielectric constant of the medium
concentration of salt
relative concentration of acids and bases
environmental effect

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Water, pH and Macromolecules
The reactions of molecules

require an enzyme in all cases
are independent of the functional groups
All of these
are the reactions of the functional groups

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