A polypeptide chain may have abrupt changes in direction and restriction in geometry because of the presence of
A)arginine.
B)glycine.
C)proline.
D)leucine or isoleucine.

Question

Quizplus · Accepted Answer

Proline is known for its rigid structure due to its cyclic amine group, which can cause abrupt changes in direction and restriction in geometry in a polypeptide chain. Arginine, glycine, leucine, and isoleucine do not have the same effect on the flexibility of a polypeptide chain.

A Polypeptide Chain May Have Abrupt Changes in Direction and Restriction