Q. In an amino acid, the carboxyl group ionizes at $pK_{a_{1}} = 2.34$ and ammonium ion at $pK_{a_{2}} = 9.6$. The isoelectric point of the amino acid is at pH

A) 5.97
B) 2.34
C) 9.60
D) 6.97
Explanation

(a)
pH (at isoelectric point)=$\frac{2.34 + 9.6}{2} = 5.97$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

Want more practice?
Practice Biomolecules MCQs