Which amino acid among the following has significant UV absorption at 280 nm used in protein quantification?
ATyrosine
BAlanine
CHistidine
DArginine
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
Which of the following amino acids has maximum buffering capacity at pH 7?
AArginine
BLysine
CHistidine
DGlycine
+ 7 more in the PDF
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