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Water, pH and Macromolecules

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

hydrogen
covalent
ionic
noncovalent

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Water, pH and Macromolecules
A Bronsted acid becomes __________ upon losing a proton.

its conjugate acid
a hydronium ion
its conjugate base
highly reactive

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

methane
gasoline (heptanes & octanes)
argon
sodium chloride

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

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Water, pH and Macromolecules
Most of the important functional groups in biological molecules contain

oxygen and/or nitrogen and are acidic
nitrogen and a phosphate
oxygen and a phosphate
oxygen and/or nitrogen and are polar

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

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

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