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WATER, PH AND MACROMOLECULES

Water, pH and Macromolecules
What is the concentration, in moles/liter, of the hydrogen ion, if pH of a solution is 7?

5 x 10-7
7 x 10-7
7
1 x 10-7

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

octanol
methanol
ethanol
butanol

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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
H2PO4-/HPO42-
H2CO3/HCO3-
Histidine+/histidine

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Water, pH and Macromolecules
If protein is made exclusively from nonpolar amino acids, then it will this protein interact with water?

It will act as a buffer and stabilize the pH
It will be attracted to water
It will form a membrane in water
be repelled by water

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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
is probably held together by noncovalent bonds
contains at least some polar covalent bonds
does not dissolve well in water

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