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Amino acids show amphotric behaviour. Ex...

Amino acids show amphotric behaviour. Explain why ?

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Due to the presence of both acids and basic groups in the same molecule. In aqueous solution `-COOH` group can lose a proton and `-NH_(2)` group can accept a proton and forms zwitter ion. In zwitter ionic form amino acids show amphoteric behaviour.
Due to the presence of both acids and basic groups in the same molecule. In aqueous solution `-COOH` group can lose a proton and `-NH_(2)` group can accept a proton and forms zwitter ion. In zwitter ionic form amino acids show amphoteric behaviour.
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