DNA is present as genetic material in all the organism except some viruses. RNA is present as genetic material in some viruses only. The DNA strands are complimentary with each other.
DNA is made of the polymers of nucleotides. The nucleotides consists of the nitrogenous bases (adenine, guanine, thymine and cytosine), deoxyribose pentose sugar and phosphate group. The DNA molecule doesnot contain sugar..lipid in its structure.
