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

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
Nonpolar substances like oils are not soluble in it

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Water, pH and Macromolecules
Which of the following character does not apply to water?

The covalent bonds in water are highly polarized
The water molecule readily forms hydrophobic interactions
The water molecule is asymmetric
All three atoms in the water molecule readily form hydrogen bonds

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Water, pH and Macromolecules
Buffer solutions

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

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