Assertion (A) : In aqueous solution, α -amino acids exists as internal salt called as zwitter ion. Reason (R) : Proline is a natural amino acid having a secondary amino group. The correct option among the following is

Question

Assertion (A) : In aqueous solution, α -amino acids exists as internal salt called as zwitter ion. Reason (R) : Proline is a natural amino acid having a secondary amino group. The correct option among the following is, (A) is true, (R) is true and (R) is the correct explanation for (A), (A) is true, (R) is true but (R) is not the correct explanation for (A), (A) is true but (R) is false, (A) is false but (R) is true

MARKS App · Accepted Answer

In aqueous solution, the carboxyl group can lose a proton and amino group can accept a proton, giving rise to a dipolar ion known as zwitter ion. This is neutral but contains both positive and negative charges. In zwitter ionic form, amino acids show amphoteric behaviour as they react both with acids and bases. Proline has a secondary amine group

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