Question

Which of the following is incorrect for amino acids?

• A. Non-essential amino acids are synthesized in the body
• B. Most naturally occuring amino acids have D-configuration
• C. Glycine is the only optically inactive among naturally occuring $\alpha$ amino acids
• D. Amino acids show amphoteric behaviour in zwitter ionic form

Answer 1

The correct option is B Most naturally occuring amino acids have D-configuration

Most naturally occuring amino acids have L-configuration. L-amino acids are represented by writing the $-N{H}_2$ group on the left hand side.
In zwitter ionic form, amino acids show amphoteric behaviour as they react with both acids and bases.