AP BIOLOGY

Detailed explanation-1: -Unlike the animal extracellular matrix, which is rich in protein and other nitrogen-containing polymers, the plant cell wall is made almost entirely of polymers that contain no nitrogen, including cellulose and lignin. Trees make a huge investment in the cellulose and lignin that comprise the bulk of their biomass.

Detailed explanation-2: -The cell wall is made of a tough fiber called cellulose which does this job. When you combine the stiff cell wall with the outward pressure of a full cell sap vacuole, you get enough strength to hold up large plants. Tree cell walls contain other tough materials such as lignin, which make them even stronger.

Detailed explanation-3: -The given statement is true. The cell wall is made up of tough fibers. It is a structural layer which covers some cells outside the plasma membrane. The cell wall can be flexible, tough and rigid sometimes.

Detailed explanation-4: -Cellulose is the primary structural component responsible for much of the mechanical strength of the cell wall. The distribution and orientation of cellulose microfibrils within the cell wall contribute to the control of cell growth.

Detailed explanation-5: -In the plant cells, cellulose is the primary component of the cell wall, in bacteria the primary component of the cell wall is peptidoglycan and in fungi the primary component of the cell wall is chitin. Explore more information about the cell wall and cell membrane or any other topic by registering at BYJU’S.