WATER, PH AND MACROMOLECULES QUIZ

only in combination with polyprotic bases

if their concentration is kept low

at pH values around neutrality

at pH values around any of their pKa's

number of neutrons gain

number of double bonds

electronegativity

number of protons released

Imidazole

All of these

Guanidinium ion

Indole

share electrons with the ions to make polar covalent bonds

surround the ions because of their charge but do not form hydrogen bonds

make nonpolar covalent bonds with the positively charged ions only

form hydrogen bonds with the positively and negatively charged ions

All of these

H2CO3/HCO3-

H2PO4-/HPO42-

Histidine+/histidine

Karl Hooper

Karl Landsteiner

Otto Warburg

Theodor Kocher

covalent bonds

hydrogen bonds

carbon atoms

hydrogen atoms

pKa values greater than 2

that cannot be used to buffer

values less than 1

been seldom found in living systems

carry a partial negative charge

carry a partial positive charge

form covalent bonds in ice

are not important for the properties of water

acids donate hydrogen ions in water while bases accept hydrogen ions

bases are polar molecules and acids are not

acids are polar molecules and bases are not

bases donate hydrogen ions in water while acids accept hydrogen ions