Zwitterions are ionized species of

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(D) Amino acids are amphoteric molecules containing both an amino group $(-NH_2)$ and a carboxyl group $(-COOH)$.In an aqueous solution,the carboxyl g

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All of these

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(D) Amino acids are amphoteric molecules containing both an amino group $(-NH_2)$ and a carboxyl group $(-COOH)$.In an aqueous solution,the carboxyl group can lose a proton to become a negatively charged carboxylate ion $(-COO^-)$,and the amino group can accept a proton to become a positively charged ammonium ion $(-NH_3^+)$.This dipolar ion,which carries both positive and negative charges simultaneously,is known as a Zwitterion.Since all amino acids (acidic,basic,and neutral) possess these functional groups,they can all exist as Zwitterions at their respective isoelectric points.

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