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

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

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Water, pH and Macromolecules
Which of the following statements about water is correct?

Nonpolar substances like oils are not soluble in it
Polar substances that can form hydrogen bonds will dissolve in it
It is critical for many of the chemical processes found in living systems
All of these

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

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

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