In considering protein secondary structure which of the following is incorrect?

In considering protein secondary structure which of the following is INCORRECT? A network of main-chain hydrogen bonds connect beta strands in a beta sheet. The beta strands can be in either parallel or antiparallel configuration. The most common structures are the alpha helix and the beta sheet. An alpha helix repeats after 18 residues and has 3.6 residues per turn. The 3_10 helix is right-handed and often contains proline residues.

Answer

Answer:

The 3₁₀ helix is right-handed and often contains
proline residues.

Explanation:

A 3₁₀ helix is a type of secondary
structure found in proteins and polypeptides. Of the countless
protein secondary structures present, the 3₁₀-helix is
the fourth most common type observed