Water, pH and Macromolecules
The reactions of molecules

require an enzyme in all cases
are independent of the functional groups
are the reactions of the functional groups
All of these

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

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

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

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
surround the ions because of their charge but do not form hydrogen bonds

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