Water, pH and Macromolecules
If protein is made exclusively from nonpolar amino acids, then it will this protein interact with water?

It will act as a buffer and stabilize the pH
It will be attracted to water
be repelled by water
It will form a membrane in water

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

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

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Water, pH and Macromolecules
Salt dissolves well in water as water molecules

make nonpolar covalent bonds with the positively charged ions only
surround the ions because of their charge but do not form hydrogen bonds
form hydrogen bonds with the positively and negatively charged ions
share electrons with the ions to make polar covalent bonds

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