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At near-neutral pH in water, amino acids exist mainly in which form?
ANeutral NH2 and COOH form
BZwitterion (dipolar ion)
CCationic form only
DAnionic form only
Answer & Solution
Correct answer: B. Zwitterion (dipolar ion)
The protonated amino group and deprotonated carboxyl group coexist, giving a dipolar ion with zero net charge.
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