Water, pH and Macromolecules
Buffer solutions

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

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

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

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Water, pH and Macromolecules
Hydrogen bonds and hydrophilic interactions are types of

weak chemical bonds that hold together the atoms within a molecule
weak chemical bonds that link together separate molecules
strong chemical bonds that link together separate molecules
strong chemical bonds that hold together the atoms within a molecule

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