Question

What is DNA ? Explain me in detail. Whats its role ?

Answer 1

DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.

To form proteins and RNA. ...
To exchange the genetic material of parental chromosomes during meiotic cell division.
To facilitate occurring mutations and even mutational change in a single nucleotide pair, called point mutation.