multiple choice question\nthe association of two or more polypeptide chains by noncovalent bonds is called…

multiple choice question\nthe association of two or more polypeptide chains by noncovalent bonds is called the ______ level of a protein.\no primary\no secondary\no tertiary\no quaternary
Answer
Brief Explanations:
The primary level of a protein is the linear sequence of amino - acids. The secondary level consists of local folding patterns like alpha - helices and beta - sheets. The tertiary level is the three - dimensional structure of a single polypeptide chain. The quaternary level is the association of two or more polypeptide chains through noncovalent bonds.
Answer:
Quaternary