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Water, pH and Macromolecules

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

none of these
ions
molecules
acids

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Water, pH and Macromolecules
Polyprotic acids such as H3PO4, can act as acid-base buffers

only in combination with polyprotic bases
at pH values around neutrality
at pH values around any of their pKa's
if their concentration is kept low

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Water, pH and Macromolecules
Which of the following alcohols would be most soluble in water?

octanol
butanol
ethanol
methanol

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Water, pH and Macromolecules
Which of the following will easily dissolve in a polar solvent?

methane
gasoline (heptanes & octanes)
sodium chloride
argon

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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
Protein
DNA
Strong base

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

All of these
Guanidinium ion
Imidazole
Indole

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