give the roles of the following
A. cellulose in the cell wall.
B. ribosomes present in RER.
C. lipids and proteins present in plasma membrane.
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A) Cellulose is a natural polymer made of smaller sugar units. It is present in cell walls of plant cells. It gives remarkable strength to the cell. It also helps in the absorption of water thus, preventing desiccation of cell.
B) ribosomes , present in RER helps in protein synthesis and also help in process of membrane biogenesis
C) plasma membrane consists of both protein and lipids, Protein embedded within the phospholipid bilayer carry out the specific functions of the plasma membrane, including selective transport of molecules and cell-cell recognition.
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