E MULTIPLE CHOICE QUESTION Which organelle controls the movement of materials into and out of the cell? Vacuoles Ribosomes Cell membrane Mitochondria

## Step 1<br />The question asks us to identify the organelle that controls the movement of materials into and out of the cell. The options provided are Vacuoles, Ribosomes, Cell membrane, and Mitochondria.<br /><br />## Step 2<br />The cell membrane, also known as the plasma membrane, is the organelle that controls the movement of materials into and out of the cell. It acts as a barrier between the cell and its external environment, and it regulates the movement of substances in and out of the cell.<br /><br />## Step 3<br />The cell membrane uses a process called diffusion to allow certain molecules to pass through while blocking others. This selective permeability ensures that essential nutrients enter the cell while harmful substances are kept out.