#Question id: 144
#Unit 1. Molecules and their Interaction Relevant to 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
#Unit 1. Molecules and their Interaction Relevant to 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
#Unit 1. Molecules and their Interaction Relevant to 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?
#Question id: 147
#Unit 1. Molecules and their Interaction Relevant to Biology
Which structure below is appropriate for glycine at neutral pH?
#Question id: 148
#Unit 1. Molecules and their Interaction Relevant to Biology
The pKa of a certain weak acid is 4.0. Calculate the ratio of proton acceptor to proton donor at pH 7.0.
#Question id: 149
#Unit 1. Molecules and their Interaction Relevant to Biology
The pKaʹs of the side chain group and the α-carboxyl group of glutamate are 4.1 and 2.1, respectively. Which statement accounts for this difference?