Which of these determines the quaternary structure of a protein?
A) Sequence of amino acids
B) Ratio of the number of acidic amino acids to the number of basic amino acids
C) Number of alpha helices and pleated sheets along the axis of the protein
D) Arrangement of subunits of amino acids that are held together by attractions between the chains
E) Arrangement of pleated sheets in the protein

Question

Quizplus · Accepted Answer

The arrangement of subunits of amino acids that are held together by attractions between the chains determines the quaternary structure of a protein. Quaternary structure refers to the arrangement of two or more polypeptide chains to form a biologically active protein complex. The subunits can be arranged in a variety of ways, including linear chains, rings, or branched structures, and the interactions between the subunits can involve non-covalent forces such as hydrogen bonds, hydrophobic interactions, or electrostatic forces.

Which of These Determines the Quaternary Structure of a Protein