MolSynapsequestion bank

MolSynapse / Question bank / Biomolecules / Amino acids: zwitterions, isoelectric point

JEE Main levelSingle correct optionDifficulty 2 of 3bm065

Glycine has pI = 6.0. In an electrophoresis experiment at pH 10, glycine migrates

Adoes not migrate
Btowards the anode (positive electrode)
Ctowards both electrodes equally
Dtowards the cathode (negative electrode)

Answer: B

At pH 10, which is above the pI, the amino group is largely deprotonated and the species is

H X_{2} N - CH X_{2} - COO X^{-}

with a net negative charge. A negatively charged ion moves to the anode.

Practice Biomolecules More on Amino acids: zwitterions, isoelectric point

Previous questionNext question

More questions on Amino acids: zwitterions, isoelectric point