A) point where all solid, liquid and vapour found
B) point of suitable concentration of amino acid
C) hydrogen ion concentration that does not allow migration of amino acid under electric field
D) melting point of amino acid
Correct Answer: C
Solution :
Isoelectric point is a hydrogen ion concentration that does not allow migration of ammo acid under electric field. It is a point at which Zwitter ions do not migrate towards any of the electrodes and ammo acid also behaves as a Zwitter ion, so they also do not migrate under electric field.
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