NEET BIOLOGY

Detailed explanation-1: -Cell wall is a rigid covering found in plant cells exterior to the cell membrane. This layer is absent in animal cells. Animal cells have cell membrane as the limiting layer. It helps to maintain the shape of animal cells.

Detailed explanation-2: -Cellulose fibers, structural proteins, and other polysaccharides help to maintain the shape and form of the cell. Additional functions of the cell wall include: Support: The cell wall provides mechanical strength and support. It also controls the direction of cell growth.

Detailed explanation-3: -The cell membrane is also called the plasma membrane. It provides protection for the cell and its cellular components from the external environment. It is selectively permeable and regulates the movement of molecules in and out of the cell.

Detailed explanation-4: -The cell wall is a rigid layer that is found outside the cell membrane and surrounds the cell, providing structural support and protection.

Detailed explanation-5: -There are two major classes of nucleic acids: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the molecule that contains all of the information required to build and maintain the cell; RNA has several roles associated with expression of the information stored in DNA.