The naturally occurring amino acid that contains only one basic functional group in its chemical structure is
A
arginine
B
lysine
C
asparagine
D
histidine
JEE MAIN 2023, Difficult
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C
asparagine
c Asparagine has only one basic functional group in its chemical structure.
Others are basic amino acid with more than one basic functional group.
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Assertion : Alpha $\left( \alpha \right) - $ amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity.
Reason : $H^+$ ion given by carboxylic group $(-COOH)$ is captured by amino group $(-NH_2)$ having lone pair of electrons.