Question

multiple choice question
which type of proteins move needed substances or waste materials through the plasma membrane?
transport proteins
primary proteins
phospholipid proteins

Explanation:

Transport proteins facilitate the movement of substances across the plasma membrane, either into or out of the cell. They can be channels or carriers for needed substances or waste materials. There are no such things as "primary proteins" in this context, and phospholipids are lipids, not proteins, though the plasma - membrane contains phospholipids along with proteins.

Answer:

A. Transport proteins