AP BIOLOGY

Detailed explanation-1: -Plasma membrane controls the flow of substances in and out of cell.

Detailed explanation-2: -The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.

Detailed explanation-3: -Answer and Explanation: The cell structure which is largely responsible for controlling the entry and exit of substances into or out of the cell is the plasma membrane.