WATER, PH AND MACROMOLECULES QUIZ

pKa values greater than 2

values less than 1

been seldom found in living systems

that cannot be used to buffer

its conjugate base

its conjugate acid

a hydronium ion

highly reactive

Indole

Guanidinium ion

Imidazole

All of these

methanol

octanol

ethanol

butanol

if their concentration is kept low

only in combination with polyprotic bases

at pH values around neutrality

at pH values around any of their pKa's

bases are polar molecules and acids are not

acids are polar molecules and bases are not

acids donate hydrogen ions in water while bases accept hydrogen ions

bases donate hydrogen ions in water while acids accept hydrogen ions

oxygen and/or nitrogen and are acidic

oxygen and a phosphate

nitrogen and a phosphate

oxygen and/or nitrogen and are polar

methane

argon

sodium chloride

gasoline (heptanes & octanes)

strong chemical bonds that link together separate molecules

weak chemical bonds that link together separate molecules

strong chemical bonds that hold together the atoms within a molecule

weak chemical bonds that hold together the atoms within a molecule

carry a partial positive charge

are not important for the properties of water

carry a partial negative charge

form covalent bonds in ice