Hi Abdul,

DNA(Deoxyribonucleic acid) in simple words is a molecule that contains our unique genetic code. It contains double helix carrying genetic instructions for the development, functioning, growth and reproduction.

DNA replication is the phenomenon during which one double - stranded DNA molecule is copied to produce two identical DNA strands to form molecules.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!