Question

why is zwitter ion form?​

Answer 1

Answer:

There is an internal transfer of a hydrogen ion from the -COOH group to the -NH2 group to leave an ion with both a negative charge and a positive charge. This is why amino acids exist in a zwitterionic form in a solution and even in the solid state also.

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Answer 2

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Here is your answer

The particular property of the amino acids of ionizable NH2 and COOH groups. In solution of different Ph 's the structure of amino acids changes. In aqueous solutions carboxyl groups transfers a proton to NH2 group to + and - charges within the molecule. This type of series is called zwitter ionic form