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Water, pH and Macromolecules

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

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

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Water, pH and Macromolecules
A biological polymer contains alanine, tyrosine, and lysine. Which of the following will be true about this molecule?

Phospholipid
DNA
Strong base
Protein

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Water, pH and Macromolecules
Which of the following acid/base pairs act as natural buffers in living systems?

All of these
Histidine+/histidine
H2PO4-/HPO42-
H2CO3/HCO3-

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Water, pH and Macromolecules
H2O and CH4 are both examples of

acids
none of these
ions
molecules

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

All of these
Imidazole
Indole
Guanidinium ion

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

noncovalent
hydrogen
ionic
covalent

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