Answer
c. tertiary structure
Work Step by Step
The arrangement of a polypeptide into a fibrous or globular shape is called its tertiary structure.
A primary structure is a sequence of amino acids stung along like beads.
A secondary structure is a primary structure that has started to fold on itself creating either an alpha helix or a beta sheet.
A tertiary structure is a secondary structure that has folded even more and turns into a globular or fibrous shape.
A quaternary structure is multiple polypeptide chains interacting with each other.
