NEET BIOLOGY

Detailed explanation-1: -The cell membrane is semipermeable (or selectively permeable). It is made of a phospholipid bilayer, along with other various lipids, proteins, and carbohydrates.

Detailed explanation-2: -The plasma membrane can be described as a phospholipid bilayer with embedded proteins that controls the passage of organic molecules, ions, water, and oxygen into and out of the cell. Wastes (such as carbon dioxide and ammonia) also leave the cell by passing through the membrane.

Detailed explanation-3: -What Makes the Cell Membrane Selectively Permeable? The cell membrane is selectively permeable due to its structure. The phospholipids are arranged in a bilayer with the hydrophobic tails facing inward. The tails are packed tightly together, thus preventing any large molecules from diffusing through.

Detailed explanation-4: -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.