As part of a purification technique, a mixture of small-protein hormones and peptides are placed in a gel and exposed to an elec
tric field. The gel was prepared using a buffer at pH 2. One peptide in the mixture is the tetrapeptide Ala-Val-Ile-Leu. This peptide will move through the gel toward the _____ terminal. positive
negative
At pH 2 the net charge of the R groups of all the amino acids that comprise the peptide in question would be positive. This happens because of the high content of protons in a solution of pH 2, a value that is below the isoelectric point of all the amino acids. Since the peptide would have a positive net charge, it would migrate to the negative terminal of the gel because opposite charges attract each other.
Nondisjunction is the failure of homologous or sister chromatids to separate properly during cell division .There are 3 forms of non junctions.1)failure of a pair of homologous chromosome to separate in meisis 1
