Question

Which of the amino acids is not optically active?

• A. Glycine
• B. Valine
• C. Leucine
• D. Isoleucine

Answer 1

The correct option is A

Glycine

The correct option is A.

Explanation of correct option:

Option A

1. Glycine is the only amino acid that does not have chiral carbon.
2. Two hydrogen atoms are attached to the same carbon.
3. Therefore, it is optically inactive.

Explanation of incorrect options:

Option B

Valine is optically active.

Option C

Leucine is optically active.

Option D

Isoleucine is optically active,

Final answer: Glycine is not optically active.