Final answer:
Cell membrane proteins have various functions, but they do not assemble polymers from amino acid monomers.
Step-by-step explanation:
A cell membrane protein has several functions, and the options listed are examples of these functions. However, option a, 'assemble polymers from amino acid monomers', is not a function of a cell membrane protein. This is because the assembly of polymers from amino acid monomers is mainly carried out by enzymes, not cell membrane proteins. Cell membrane proteins are involved in other functions such as transferring molecules from the cytoplasm to the outside of the cell, helping recognize foreign invaders, binding specific signaling molecules, and assisting cell-to-cell communication.
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