AP BIOLOGY

Detailed explanation-1: -The plasma membrane is the outer lining of the cell. It separates the cell from its environment and allows materials to enter and leave the cell. Ribosomes. Ribosomes are organelles that process the cell’s genetic instructions to create proteins.

Detailed explanation-2: -Cell membranes serve as barriers and gatekeepers. They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot. Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly.

Detailed explanation-3: -The cell membrane also called as plasma membrane that separates the interior of a cell from the outside environment. The cell membrane surrounds the protoplasm of a cell.