Cell Structure and Function Practice Test

A plant cell is placed in a concentrated salt solution. The plasma membrane pulls away from the cell wall, and the cytoplasm shrinks inward. The cell wall remains rigid and retains its shape. Which feature best explains why the wall does not shrink with the cytoplasm?

A cell is exposed to a toxin that disrupts actin filament polymerization. The cell can still synthesize proteins normally, but it shows reduced formation of membrane protrusions and slower engulfment of large particles. Which outcome is most likely due to the disrupted structure?