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

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

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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
bases are polar molecules and acids are not
acids are polar molecules and bases are not

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Water, pH and Macromolecules
Hydrogen bonds and hydrophilic interactions are types of

strong chemical bonds that link together separate molecules
weak chemical bonds that link together separate molecules
weak chemical bonds that hold together the atoms within a molecule
strong chemical bonds that hold together the atoms within a molecule

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