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

Hint:

Optical activity in amino acids arises due to the presence of a chiral center, which is absent in glycine.

Answer 1

The Correct Option is C

Step 1: All amino acids except glycine are optically active because glycine has two hydrogen atoms attached to the central carbon, making it achiral.

Final Answer: \[ \boxed{\text{All amino acids except glycine are optically active}} \]