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

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

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

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

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

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

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Water, pH and Macromolecules
Buffer solutions

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

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