Water, pH and Macromolecules
Which of the following character does not apply to water?

All three atoms in the water molecule readily form hydrogen bonds
The water molecule is asymmetric
The water molecule readily forms hydrophobic interactions
The covalent bonds in water are highly polarized

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Water, pH and Macromolecules
The main difference between an acid and a base is that

bases are polar molecules and acids are not
acids donate hydrogen ions in water while bases accept hydrogen ions
bases donate hydrogen ions in water while acids accept hydrogen ions
acids are polar molecules and bases are not

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Water, pH and Macromolecules
Buffer solutions

tend to maintain a relatively constant pH.
cause a decrease in pH when acids are added to them.
are rarely found in living systems
will always have a pH of 7

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