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Water, pH and Macromolecules

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
Which of the following indicates that the pK of an acid is numerically equal to the pH of the solution when the molar concentration of the acid and its conjugate base are equal?

Henderson-Hasselbalch equation
Michaelis-Menten equation
Hardy-Windberg law
Haldanes equation

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

none of these
acids
ions
molecules

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Water, pH and Macromolecules
Weak acids generally have pKa

been seldom found in living systems
values less than 1
that cannot be used to buffer
pKa values greater than 2

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

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

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Water, pH and Macromolecules
A biological polymer contains alanine, tyrosine, and lysine. Which of the following will be true about this molecule?

Phospholipid
Protein
Strong base
DNA

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