The PRIMARY structure of a protein is formed by alpha helice

The PRIMARY structure of a protein is:

formed by alpha helices and beta sheets

formed by multiple polypeptide chains binding to one another

formed by dehydration reactions that join amino acids together

all of the above are true

Solution

option C.

The primrary structure of a protein is formed by dehydration reactions that join amino acids together.

dehydration reaction removes H₂O between two amino acids to form peptide bond. this is the native primary structure that consists of a linear chain of amino acids.

alpha and beta structures are secondary structures.

tertiary structure involves the interaction between different polypeptide chains.