Question

Which of the following is not true about amino acids?

• A. They are constituents of all proteins
• B. Alanine having one amino and one carboxylic group.
• C. Most naturally occurring amino acids have $D$-configuration
• D. Glycine is the only naturally occurring amino acid which is optically inactive

Answer 1

Answer: (C)

Most naturally occurring amino acids have $L$-configuration.