Final answer:
Peripheral membrane proteins are found on the inner or outer surface of the lipid bilayer and can be attached to integral proteins or phospholipids. They serve various functions for the cell.
Step-by-step explanation:
Peripheral membrane proteins are typically found on the inner or outer surface of the lipid bilayer. They can be attached to integral proteins or phospholipids. These proteins serve various functions for the cell, such as acting as enzymes, structural attachments for the cytoskeleton, or part of the cell's recognition sites.