Question

multiple - choice question
what do peripheral proteins do?
protect the dna
allow larger molecules in and out of the cell
help cells communicate
regulate temperature fluctuations

Explanation:

Peripheral proteins are associated with the cell membrane. They have various functions. Protecting DNA is not a function of peripheral proteins. Allowing larger molecules in and out of the cell is mainly the role of integral membrane proteins (like channels and transporters). Regulating temperature fluctuations is not a typical role of peripheral proteins. One of the important functions of peripheral proteins is to help cells communicate. For example, some peripheral proteins can act as receptors or be involved in signal - transduction pathways on the cell surface.

Answer:

C. help cells communicate