Secondary structure of proteins
A) is maintained by hydrogen bonds.
B) refers to proteins consisting of two (or more) subunits held together by noncovalent forces.
C) encompasses any hydrogen-bonded interaction found in proteins.
D) refers to proteins consisting of one or more polypeptide chains plus a nonprotein moiety.
E) is found only in fibrous proteins.

Question

Quizplus · Accepted Answer

Secondary structure of proteins is maintained by hydrogen bonds. Specifically, alpha helices and beta sheets are stabilized by hydrogen bonds between nearby amino acid residues.

Answer: E if only one choice allowed; A and E if multiple choices allowed
 Fibrous proteins often have a repetitive secondary structure, such as alpha helices in keratin. However, many other proteins have secondary structures as well, so choice E is not a complete and accurate statement.

Secondary Structure of Proteins