Question

multiple choice question
tertiary structure is the bending of proteins into

helices and sheets
globular or fibrous shapes
a line of amino acids

Explanation:

The secondary structure of proteins involves formation of helices and sheets. The primary structure is a linear sequence of amino - acids. Tertiary structure is the overall 3 - D folding of a polypeptide chain into either globular or fibrous shapes due to various interactions like hydrophobic interactions, hydrogen bonds, etc.

Answer:

B. globular or fibrous shapes