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Water, pH and Macromolecules

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

methane
gasoline (heptanes & octanes)
sodium chloride
argon

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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?

Protein
Phospholipid
DNA
Strong base

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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
should act as a good buffer for acids and bases
does not dissolve well in water
is probably held together by noncovalent bonds

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

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

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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?

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

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Water, pH and Macromolecules
The reason that fats contain more energy than simple sugars, is fats have many more

carbon atoms
covalent bonds
hydrogen atoms
hydrogen bonds

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