Question

(secondary structure)

Protein Hydrogen
Bonds in __ __
The red dotted lines
show the hydrogen
bonds between amino
acids along the chains
maintaining the
helical structure.

Answer 1

The secondary structure of proteins, such as the α-helix and β-pleated sheet, are maintained by hydrogen bonding between amino acids in the polypeptide chain.

Step-by-step explanation:

The secondary structure of a protein refers to the local folding of the polypeptide chain. The most common secondary structures are the α-helix and β-pleated sheet. These structures are held together by hydrogen bonds.

In the α-helix structure, hydrogen bonds form between the oxygen atom in a carbonyl group of one amino acid and the hydrogen atom of the amino group that is four amino acid units farther along the chain.

In the β-pleated sheet, hydrogen bonds form between continuous sequences of carbonyl and amino groups that are further separated on the backbone of the polypeptide chain.