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Water, pH and Macromolecules

Water, pH and Macromolecules
Who discovered and described the blood groups (ABO) classification?

Otto Warburg
Theodor Kocher
Karl Hooper
Karl Landsteiner

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

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

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

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

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Water, pH and Macromolecules
What is the concentration, in moles/liter, of the hydrogen ion, if pH of a solution is 7?

1 x 10-7
7 x 10-7
5 x 10-7
7

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Water, pH and Macromolecules
Which of the following will easily dissolve in a polar solvent?

gasoline (heptanes & octanes)
methane
sodium chloride
argon

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Water, pH and Macromolecules
A compound that is capable of forming hydrogen bonds with water

contains at least some polar covalent bonds
does not dissolve well in water
should act as a good buffer for acids and bases
is probably held together by noncovalent bonds

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