STANDARDChemistry-Biomolecules
STANDARD Chemistry Amino Acids MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Amino acids generally exist in the form of Zwitter ions. This means they contain
A
Basic –NH₂ group and acidic –COOH group
B
The basic –NH₃⁺ group and acidic –COO⁻ group
C
Basic –NH₂ and acidic –H⁺ group
D
Basic –COO⁻ group and acidic –NH₃⁺ group
Correct Answer
Option B
Detailed Explanation
Zwitter ion contains both +ve and –ve charge. Proton of –COOH group is transferred to the –NH₂ group. –NH₃⁺ group is acidic since it can donate a proton and –COO⁻ group is basic since it can accept a proton.
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