#Question id: 140
#Section 2: General Biology
A polypeptide chain may have abrupt changes in direction and restriction in geometry because of the presence of
#Question id: 141
#Section 2: General Biology
At the isoelectric pH of an amino acid which has two pKa values the net charge is
#Question id: 142
#Section 2: General Biology
Histidine has pKa values of 1.8, 6.0 (R-group) and 9.3 . At pH 8.0, the net charge on histidine is
#Question id: 144
#Section 2: General Biology
The pKaʹs of arginineʹs α-Carboxyl group, α-Amino group and side chain are 1.8, 9.0 and 12.5, respectively. Calculate the isoelectric point.
#Question id: 145
#Section 2: General Biology
The pKaʹs of isoleucineʹs α-Carboxyl group and α-Amino group are 2.3 and 9.8, respectively. Calculate the isoelectric point.
#Question id: 146
#Section 2: General Biology
The pH inside cells is normally near pH 7. At pH 7 which statement is true about the charges (ionization state) of the α-Carboxyl and α-Amino groups of an amino acid?