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

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

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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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