Water, pH and Macromolecules
The elements oxygen, nitrogen, and carbon

are common elements in the molecules that make up living organisms
All of these
can all form covalent bonds with other elements
contain protons and neutrons in their atomic nuclei

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

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

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Water, pH and Macromolecules
The main difference between an acid and a base is that

bases donate hydrogen ions in water while acids accept hydrogen ions
acids donate hydrogen ions in water while bases accept hydrogen ions
acids are polar molecules and bases are not
bases are polar molecules and acids are not

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