<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> Cellulose is an organic compound with the formula (C O), a polysaccharide consisting of a linear chain of several hundred to many thousands of β (1 → 4) linked D - glucose units . Cellulose is an important structural component of the primary cell wall of green plants, many forms of algae and the oomycetes . Some species of bacteria secrete it to form biofilms . Cellulose is the most abundant organic polymer on Earth . The cellulose content of cotton fiber is 90%, that of wood is 40--50%, and that of dried hemp is approximately 57% . </P> <P> Cellulose is mainly used to produce paperboard and paper . Smaller quantities are converted into a wide variety of derivative products such as cellophane and rayon . Conversion of cellulose from energy crops into biofuels such as cellulosic ethanol is under investigation as an alternative fuel source . Cellulose for industrial use is mainly obtained from wood pulp and cotton . </P>

Glucose molecular is primary used by the cell for
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