Water, pH and Macromolecules
Buffer solutions

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

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

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

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Water, pH and Macromolecules
Which of the following statements about covalently bonded molecules is false?

Noncovalent bonds may also be present, especially if the molecule is large
The chemical bonds that hold the molecule together are relatively strong
Such molecules often result from the interaction of ionized atoms
Electrons are shared between the atoms that make up the molecule

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