Question

In most proteins, these polar groups are aligned and form hydrogen bonds with one another when the backbone bends to form one of two possible structures:

Answer 1

In most proteins, the secondary structure is formed by the arrangement of polar groups in the polypeptide chain. The two common secondary structures are the alpha helix and beta-pleated sheet.

Step-by-step explanation:

In most proteins, the secondary structure is formed by the arrangement of polar groups in the polypeptide chain. In most proteins, the secondary structure is formed by the arrangement of polar groups in the polypeptide chain. The two common secondary structures are the alpha helix and beta-pleated sheet. The two common secondary structures are the alpha helix and beta-pleated sheet.

In the alpha helix, hydrogen bonds form between the oxygen atom in the carbonyl group of one amino acid and the hydrogen atom of the amino group that is four amino acids away. In the beta-pleated sheet, the pleats are formed by hydrogen bonds between continuous sequences of carbonyl and amino groups that are further separated on the backbone of the polypeptide chain.