Which of the following methods cannot be used to precipitate proteins?
AAdd alcohol and acetone
BUsing heavy metal ions
CAdding trichloroacetic acid
DMoving pH away from isoelectric pH
What is the most important extracellular buffer?
ABicarbonates
BPhosphate buffer
CPlasma protein buffer
DAmmonium buffer
The pH of body fluids is stabilized by buffer systems. Which of the following compounds is the most effective buffer at physiologic pH?
ANH4OH, pKa = 9.24
BNa2HPO4, pKa = 12.32
CNaH2PO4, pKa = 7.21
DCH3CO2H, pKa = 4.75
+ 7 more in the PDF
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