| − | '''Cellulose''' is a substance made of [[sugar|sugars]]. It is common in the [[cell wall|cell walls]] of many [[organism|organisms]]<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>, most notably in the wood of trees, and other [[vegetal]]s. It is therefore one of the main component of [[paper]]. | + | '''Cellulose''' is a substance made of [[sugar|sugars]], mainly [[glucose]] and [[fructose]]. Unlike most other [[oligosaccharide]]s, it is digested only partially when eaten, but it still plays a major role in human activities, notably construction, paper making, [[silk]] production and timber industry. It is common in the [[cell wall|cell walls]] of many [[organism|organisms]]<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>, most notably in the wood of trees, and other [[vegetal]]s. It is therefore one of the main component of [[paper]]. In [[wood]] cellulose is the main component, along with [[lignin]], a polymeric product of the [[pentose phosphate]] reaction chain. |