Which of the following types of protein structures is characterized by a helical arrangement of amino acids stabilized by hydrogen bonds?

A Primary structure
B Secondary structure ✓
C Tertiary structure
D Quaternary structure

Explanation

The secondary structure of a protein refers to the local arrangements of amino acids, such as alpha helices and beta sheets. Alpha helices are characterized by a helical arrangement of amino acids stabilized by hydrogen bonds between the carbonyl oxygen of one amino acid and the amide hydrogen of another.

Source

Alberts Molecular Biology of the Cell
Fundamentals of Biochemistry Biochemistry Protein Structure Easy MEDICAL Confidence: high