SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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PRIMARY CELL WALL-While a plant cell is being formed, a primary cell wall develops just outside the cell membrane. As the cell expands in length, cellulose and other molecules are added, enlarging the cell wall. When the cell reaches full size, a secondary cell wall MAY form.
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SECONDARY CELL WALL-The primary cell walls forms between the primary cell wall and the cell membrane. The secondary cell wall is tough and woody, in fact the secondary cell wall is what we call wood. Once a secondary cell wall forms, a plant cell can grow NO further. The cells are dead.
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SECONDARY CELL WALL-The secondary cell walls forms between the primary cell wall and the cell membrane. The secondary cell wall is tough and woody, in fact the secondary cell wall is what we call wood. Once a secondary cell wall forms, a plant cell can grow NO further. The cells are dead.
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PRIMARY CELL WALL-While a plant cell is being formed, a secondary cell wall develops just outside the cell membrane. As the cell expands in length, cellulose and other molecules are added, enlarging the cell wall. When the cell reaches full size, a secondary cell wall MAY form.
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Detailed explanation-1: -The primary cell wall, generally a thin, flexible and extensible layer formed while the cell is growing. The secondary cell wall, a thick layer formed inside the primary cell wall after the cell is fully grown. It is not found in all cell types.
Detailed explanation-2: -The cell wall is composed of a network of cellulose microfibrils and cross-linking glycans embedded in a highly cross-linked matrix of pectin polysaccharides.
Detailed explanation-3: -The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.
Detailed explanation-4: -A secondary cell wall is an additional layer of cell wall formed in a mature cell and is made up of cellulose, hemicellulose, and lignin. It is formed after the plant cell has attained a certain amount of growth in the later stage.