Q.
Histidine, a heterocyclic amino acid has following structure at $pH < 1.82$
At $pH > 1.82$, it should have which structure?
A) [image:14_image8.emf]
B) [image:14_image9.emf]
C) [image:14_image10.emf]
D) [image:14_image11.emf]
Explanation
(a)
On increasing the pH by adding an alkali; $H^{+}$ will be lost from $- COOH$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.