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Water, pH and Macromolecules

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

Karl Landsteiner
Theodor Kocher
Otto Warburg
Karl Hooper

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Water, pH and Macromolecules
A Bronsted acid becomes __________ upon losing a proton.

a hydronium ion
its conjugate acid
highly reactive
its conjugate base

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Water, pH and Macromolecules
Polyprotic acids such as H3PO4, can act as acid-base buffers

at pH values around any of their pKa's
only in combination with polyprotic bases
if their concentration is kept low
at pH values around neutrality

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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?

DNA
Protein
Phospholipid
Strong base

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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
is probably held together by noncovalent bonds
does not dissolve well in water
contains at least some polar covalent bonds

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Water, pH and Macromolecules
If protein is made exclusively from nonpolar amino acids, then it will this protein interact with water?

It will form a membrane in water
It will act as a buffer and stabilize the pH
It will be attracted to water
be repelled by water

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