AP BIOLOGY

Detailed explanation-1: -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-2: -Specialized proteins in the cell membrane regulate the concentration of specific molecules inside the cell. Membrane transport proteins are specific and selective for the molecules they move, and they often use energy to catalyze passage.

Detailed explanation-3: -Cell membrane has a common function in both plants and animals.

Detailed explanation-4: -Unlike the cell wall, the cell membrane is present in all living organisms, including plants. The main role of the cell membrane is to provide protection to the cell from its surroundings. The cell membrane or plasma membrane controls the passage of some solutes and water into and out of the cell.

Detailed explanation-5: -The cell membrane controls what goes in and out by having protein channels that act like funnels in some cases and pumps in other cases. Passive transport does not require energy molecules and happens when a funnel opens in the membrane, letting molecules flow through.