Water, pH and Macromolecules
The reactions of molecules

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

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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
Electrons are shared between the atoms that make up the molecule
Noncovalent bonds may also be present, especially if the molecule is large
The chemical bonds that hold the molecule together are relatively strong

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

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

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

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