Question

What are the two most common secondary structures in a protein?

1) peptide bonds
2) pleated sheets
3) the sequence of amino acids
4) polypeptide chain twist
5) alpha helices
6) globular clum

Answer 1

The two most common secondary structures in a protein are alpha helices and beta-pleated sheets, both of which are stabilized by hydrogen bonds that contribute to the protein's shape and function.

Step-by-step explanation:

The two most common secondary structures in a protein are the alpha helices and the beta-pleated sheets. These structures are a result of the local folding of the polypeptide chain and are stabilized by hydrogen bonds. In an alpha helix, the hydrogen bonds form between the oxygen atom in the carbonyl group of one amino acid and another amino acid that is four amino acids farther along the chain.

Beta-pleated sheets involve hydrogen bonds that connect different regions of the polypeptide chain, either within the same chain or between multiple chains. These secondary structures play a critical role in determining the overall shape and function of the protein.