A scientist is examining the function of macromolecules in a cell. She notices that movement of large molecules into and out of the cell is disrupted when she damages one specific type of macromolecule. Which macromolecule has she most likely damaged?

Proteins help form and operate channels and transporters in the cell membrane, allowing large molecules to move into and out of the cell. Damaging these membrane proteins can disrupt that transport. Carbohydrates, steroids, and nucleic acids do not typically carry out this transport function.

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