Question

Which of the following is not optically active ?

• A. Glycine
• B. Tyrosine
• C. Lysine
• D. Alanine

Answer 1

Answer: (A)

Glycine

Answer 2

The structures of the given amino acids are as

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$(C^{*}$= asymmetric carbon atom)
Thus, glycine because of the absence of asymmetric carbon atom is optically inactive