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Water, pH and Macromolecules

Water, pH and Macromolecules
The strength of an acid depends on

number of double bonds
electronegativity
number of protons released
number of neutrons gain

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Water, pH and Macromolecules
Most of the important functional groups in biological molecules contain

nitrogen and a phosphate
oxygen and/or nitrogen and are polar
oxygen and a phosphate
oxygen and/or nitrogen and are acidic

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Water, pH and Macromolecules
Which of the following organic groups are found in naturally occuring amino acids?

All of these
Guanidinium ion
Indole
Imidazole

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Water, pH and Macromolecules
The dissociation constant of H2O at 25° C is

107 M
10-7 M
10-14 M
1014 M

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Water, pH and Macromolecules
The effectiveness or capacity of a buffer solution can be affected by

both (a) and (b)
concentration of the conjugate base to the weak acid
molar concentration of the buffer components
temperature of buffer components

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Water, pH and Macromolecules
Molecules in which the atoms are held together by __________ bonds have the strongest chemical linkages.

ionic
noncovalent
hydrogen
covalent

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