Among the following amino acid, which one is basic in nature (a)Glutamic acid and aspartic acid (b)Lysine and arginine (c)Glycine and alanine (d)Histidine and proline
Option B.There are three amino acids that have basic side chains at neutral pH. These are arginine, lysine, and histidine. Their side chains contain nitrogen and resemble ammonia, which is a base. Their pKa's are high enough that they tend to bind protons, gaining a positive charge in the process.
