A protein ' $X$ ' with molecular weight of $70,000\,u$, on hydrolysis gives amino acids. One of these amino acid is
A
B
C
D
JEE MAIN 2023, Difficult
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B
b Only in option $(2)$ $\alpha$-Amino acid is given all the other options are not $\alpha$-Amino acids.
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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.