Question

Which one of the following statements is correct?

• A. All amino acids except lysine are optically active
• B. All amino acids are optically active
• C. All amino acids except glycine are optically active
• D. All amino acids except glutamic acids are optically active

Answer 1

Answer: (C)

All amino acids except glycine are optically active

Answer 2

Only glycine is optically inactive amino acid.