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AIPMTAIPMT 1999Cell : The Unit of Life
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The ribosomes provide space for the synthesis of proteins in the cell. Hence, they are known as the 'protein factories' of the cell. The ribosomes bound to the membranes generally synthesize proteins for export as secretions by exocytosis, or for incorporation into membranes, or for inclusion into lysosomes. The free ribosomes generally produce enzymic proteins for use in the cell itself.