The carbon cycle is the system of biological and chemical processes that make carbon available to living things for use in tissue building and energy release (Kino*censored*a 242). All living cells are composed of proteins consisting of carbon, hydrogen, oxygen, and nitrogen in various combinations, and each living organism puts these elements together according to its own genetic code. To do this the organism must have these available in special compounds built around carbon. …showed first 75 words of 344 total…

…showed last 75 words of 344 total…inulin , and fats and store them for future use. Regardless of whether the stored food is used later by the plant or consumed by some other organism, the molecules will ultimately be digested and oxidized, and carbon dioxide and water will be discharged. Other molecules of sugar undergo a series of chemical changes and are finally combin! ed with nitrogen compounds to form protein substances, which are then used to build tissues (WWW 2). ------------------------------------------------------------------------ **Bibliography**