<prompt> The 3 dimensional shape of a protein is maintained mainly bya Strong covalent interactionsb Interactions with other proteinsc Multiple weak interactionsd Interactions with prosthetic groupsacbcabcd  <response>: Both weak noncovalent interactions and strong covalent bonds stabilize the tertiary structure of the protein which provides three-dimensional shape.The major forces stabilizing tertiary structure which provides three-dimensional shape are multiple weak noncovalent interactions:- Hydrogen bonds, hydrophobic interactions, ionic bond, and Van der Waals forces.Covalent Disulfide bonds also provide some stability. 