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

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

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

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

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