NEET BIOLOGY

Detailed explanation-1: -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: -There are integral membrane proteins called transporters that mediate movement of molecules that are too polar or too large to move across a membrane by diffusion. In order to accomplish this, a solute (molecule to be transported) binds to a specific site on a transporter on one surface of the membrane.

Detailed explanation-3: -The cell membrane is called selectively permeable as it only allows specific molecules to pass. Only specific molecules like water and gaseous molecules can pass through the cell membrane directly. It stops the flow of other molecules towards the two sides.