Question

Which of the following peptides is cyclic in nature?

• A. \( \text{Glutathione} \)
• B. \( \text{Gramicidin} \)
• C. \( \text{Met-enkephalin} \)
• D. \( \text{Dynorphin} \)

Hint:

Cyclic peptides often exhibit enhanced stability and bioactivity compared to linear counterparts.

Answer 1

The Correct Option is B

Gramicidin is a cyclic peptide, forming ion channels in bacterial membranes to facilitate antibiotic function. Other peptides have linear structures.