Refer to the figure below. What level of protein structure is illustrated in sections A and B of this polypeptide, and what types of forces indicated by the letter C stabilize these sections?

Question

Refer to the figure below.  What level of protein structure is illustrated in sections A and B of this polypeptide, and what types of forces indicated by the letter C stabilize these sections?

Quizplus · Accepted Answer

Sections A and B illustrate the secondary structure of the polypeptide, specifically an alpha helix. This structure is stabilized by hydrogen bonds between the carbonyl group of one amino acid and the amino group of another amino acid. Therefore, the correct answer is B, secondary structure and hydrogen bonds.

Refer to the Figure Below