The ribotide and riboside forms of trans-zeatin can be interconverted, and free transzeatin can be formed from the ribotide by the

#Question id: 139

#Unit 1. Molecules and their Interaction Relevant to Biology

 A sequence of amino acids with a relatively high hydropathy is very likely to function by

#Question id: 140

#Unit 1. Molecules and their Interaction Relevant to Biology

A polypeptide chain may have abrupt changes in direction and restriction in geometry because of the presence of

#Question id: 141

#Unit 1. Molecules and their Interaction Relevant to Biology

At the isoelectric pH of an amino acid which has two pKa values the net charge is

#Question id: 142

#Unit 1. Molecules and their Interaction Relevant to 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: 143

#Unit 1. Molecules and their Interaction Relevant to Biology

Which amino acid is ideal for the transfer of protons within the catalytic site of enzymes due to the presence of significant amounts of both the protonated and deprotonated forms of its side chain at biological pH?

#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.