Question

Which of the following a-amino acids is not optically active?

• A. Alanine
• B. Glycine
• C. Phenylalanine
• D. Cysteine

Answer 1

Answer: (B)

Glycine

Answer 2

Glycine $\mathrm { H } _ { 2 } \mathrm {~N} - \mathrm { CH } _ { 2 } - \mathrm { COOH }$ is optically inactive hence ans