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Water, pH and Macromolecules

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

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

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Water, pH and Macromolecules
Which of the following acid/base pairs act as natural buffers in living systems?

H2CO3/HCO3-
All of these
H2PO4-/HPO42-
Histidine+/histidine

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Water, pH and Macromolecules
The pH of a solution is determined by

environmental effect
relative concentration of acids and bases
dielectric constant of the medium
concentration of salt

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Water, pH and Macromolecules
H2O and CH4 are both examples of

molecules
acids
none of these
ions

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

covalent
noncovalent
ionic
hydrogen

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Water, pH and Macromolecules
The reactions of molecules

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

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