Question

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

Explanation:

Integral proteins are embedded in the cell membrane. They can act as channels or transporters. Larger molecules that cannot pass through the lipid bilayer of the cell membrane (due to being polar or having a large size) need integral proteins (like transport proteins) to move in and out of the cell. Cell - cell communication is mainly done by other molecules like signaling molecules (not the main function of integral proteins in general). Temperature regulation is not a function of integral proteins. Protecting DNA is the function of the nuclear membrane (for eukaryotes) or the cell's overall structure, not integral proteins.

Answer:

allow larger molecules in and out of the cell