Question

Identify the correct statement among the following:

• A. All naturally occurring amino acids except glycine contain one chiral centre.
• B. All naturally occurring amino acids are optically active.
• C. Glutamic acid is the only amino acid that contains a –COOH group at the side chain.
• D. Amino acid, cysteine easily undergoes dimerization due to the presence of free SH group.

Hint:

For amino acids, remember that glycine is the only amino acid without a chiral centre. Most amino acids, except for glycine, have one chiral carbon.

Answer 1

The Correct Option is A

- Glycine is optically inactive. 
- Aspartic acid also contains COOH group at the side chain. 
- \(\alpha\)-Amino acids have a chiral carbon except for glycine. 
- Cysteine undergoes dimerization due to the presence of free –SH group, but the dimerization process is not as common.