Carrying the genetic code and determining an organism's structure and function are the functions of
dna
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The DNA acts as carrier of genetic information and is also involved determining the structure and function of organism.

The fundamental job of DNA is that it acts as carrier of genetic information and is also involved determining the structure and function of organism. It is the major components due to which the cell secrets proteins which are required for all metabolic action of the cell.  

The DNA sections that convey hereditary data are called genes; however, other DNA arrangements have auxiliary purposes, or are associated with controlling the statement of hereditary data.