Final answer:
The spiral shape of a coiled protein created by a polypeptide chain that intertwines with each other is called an alpha helix.
Step-by-step explanation:
The spiral shape of a coiled protein created by a polypeptide chain that intertwines with each other is called an alpha helix. In the alpha helix, the polypeptide chain acquires a coil shape spiraling clockwise from N-terminus to C-terminus, held by hydrogen bonds between the carbonyl groups and amine groups in the backbone.