Final answer:
Proteins in the cell membrane have functions such as transport, cell signaling, and enzymatic activity.
Step-by-step explanation:
Proteins have several important functions in the cell membrane. One of their main functions is to act as transporters and channels, allowing specific molecules to move in and out of the cell. For example, carrier proteins bind to specific molecules and transport them across the membrane, while channel proteins provide a pathway for ions and small molecules to pass through. Proteins in the cell membrane also play a vital role in cell signaling, where they function as receptors for signaling molecules and can initiate a cellular response. Additionally, proteins can act as enzymes in the cell membrane, catalyzing different biochemical reactions.
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