[I] amino acid. [II] rod protein. [III] conduction protein. [IV] membrane protein.

Answer the following question given this paragraph: The second main component of plasma membranes are the variety of proteins. A membrane protein is a protein molecule that is attached to, or associated with the membrane of a cell or an organelle. Membrane proteins can be put into two groups based on how the protein is associated with the membrane: (1) integral membrane proteins and (2) peripheral membrane proteins. Q: What type of protein is a protein molecule that is attached to, or associated with the membrane of a cell or an organelle? A:
Answer:
[IV]