Final answer:
In the budding region, the inside of the plasma membrane becomes coated with matrix proteins, which help anchor the membrane to the cytoskeleton and maintain its structure.
Step-by-step explanation:
This is because proteins on the interior of the plasma membrane serve to anchor the membrane to fibers of the cytoskeleton. These matrix proteins, along with peripheral proteins, facilitate interaction with the cytoskeleton and contribute to the shape and structure of the budding region. Contrarily, carbohydrates are found on the exterior surface of cells, typically bound to proteins as glycoproteins or to lipids as glycolipids, forming the glycocalyx which plays a crucial role in cell recognition and interaction with the watery environment.