Quaternary Structure of Proteins Refers to
A) the Arrangement of the Protein's

Quaternary structure of proteins refers to

A) the arrangement of the protein's atoms in three-dimensional space.
B) whether the chain is an $\alpha$ helix or $\beta$ pleated sheet.
C) the number and kind of polypeptide subunits the protein has.
D) the four-fold symmetry of the protein.
E) the lipids or carbohydrates that are attached to the proteins.