Question

4
integrins are glycoproteins that help link the cytoskeleton and the
multiple choice
cell wall.
ribosomes.
extracellular matrix.
cytoplasm.

Explanation:

Integrins are transmembrane glycoproteins. Their extracellular domain binds to components of the extracellular matrix, while their intracellular domain links to the cytoskeleton, creating a physical connection between these two structures. The other options are incorrect: cell walls are structural layers outside some cells not linked by integrins, ribosomes are protein-making organelles, and the cytoplasm is the internal cell fluid not the external structure integrins connect to.

Answer:

○ extracellular matrix.